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Pass4sure SK0-004 Practice Test | Kill your exam with Pass4sure SK0-004 real questions. - alphernet.com.au

SK0-004 | CompTIA Server+

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SK0-004 - CompTIA Server+ - braindump

Vendor CompTIA
Exam Number SK0-004
Exam Name CompTIA Server+
Questions 259 Q & A
Recent Update February 15, 2019
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SK0-004 exam Dumps Source : CompTIA Server+

Test Code : SK0-004
Test Name : CompTIA Server+
Vendor Name : CompTIA
Q&A : 259 Real Questions

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CompTIA CompTIA Server

significance of CompTIA A+ 220-902 examination and A+ Certification | killexams.com Real Questions and Pass4sure dumps

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within the quickly-paced world, expertise has modified the manner we reside and work.  people who are planning for a profession or considering of a career, networking expertise are certain to deliver improved potentialities. computing device networking has turn into a crucial a part of the most company. to satisfy the necessities and work with plenty stronger networking levels and certifications have now develop into mandatory. there is a mess of coaching centers and on-line courses that present these certifications. One such examination is CompTIA A+ 220-902 exam.

what is CompTIA A+ 220-902 exam and why you need it?

as a way to gain talents in networking and operating systems and to construct exception careers in assistance expertise, CompTIA A+ 220-902 examination occupies a phenomenal part.

CompTIA A+ 220-902 is a certification examination that covers notebook hardware and peripherals, networking concerns, mobile hardware, and troubleshooting.  This exam set a very good basis in your IT profession and a successful line in networking. 

Why you need IT Certifications?

before stepping into-depth in regards to the features and the professionals of the suggestions know-how and networking certifications, first, it's primary to understand what the that means of desktop networking and network safety is.

desktop networking is a self-discipline in engineering that examine the interfacing two or extra computing devices with every different via a correct conversation channel. computer networks are continually developed with a mix of software and hardware. Likewise, when it comes to networking security, it is the observe of preventing and holding unlawful invasion in the company community.

large agencies have thousands of contraptions in a community; although, a scarcity of network protection considerations will outcomes in huge chaos. one of the vital standard threats of network safety are a virus, worms, adware. When the company has a community that has no immune to these assaults, then the company has a possible risk of falling sufferer to information theft and sabotage. hence, community security is vital than ever. however, your community security can not be improved without needing the most efficient network security expert.

These specialists earn certifications from networking exams like CompTIA A+ 220-902whodoes a multifaceted job. They keep and integrate corporate WAN, LAN and server architecture. A+ certified authorities are enormously accountable for imposing safety plans and constantly video display the networks from malicious threats.  however, what is the curriculum you need to cowl and what issues be sure you be general to be CompTIA A+ certified professional?

CompTIA A+ in a nutshell

CompTIA A+ 220-902 exam majorly focusses on setting up and configuring major working systems like windows, Android, iOS, Linux and Apple. despite the fact, you should get familiarized with a mess of points like cell hardware, networking and troubleshooting, laptop hardware and peripherals and prolonged talents of community safety.

clients can make the most of a number of materials purchasable on-line. in addition, the CompTIA web site gives practising on a considerable number of features and offer analyze substances to grasp in the exam. individuals who need to have classroom training could make use of their online session. After the completion of the practicing, which you can soak up a few observe to look at various your knowing and to have a better perception concerning the CompTIA A+ 220-902 examination targets.

a success completion of your exam can support you boost to your profession, beef up your IT skills and become a more certified employee. aside from these, there's a large number of benefits of earning CompTIA A+certification.

fantastic merits of gaining CompTIA A+ Certification

within the newest research about networking investments conducted with the aid of accurate networking crew of seven-hundred networking consultants, the results reveal that every company requires tremendously skilled networking infrastructure skilled to handle the increasing networking challenges and safety considerations.  So, people with these kinds of certifications are totally prominent.

one of the crucial wonderful merits of CompTIA A+ certification are:

  • effortless to get employed – An IT knowledgeable professional in multiple areas of networking will at all times be on the properly of the checklist, and they're going to have extra priority all the way through job recruitments.  during this incredibly competitive world, the place the volume of student graduated outweighs the quantity of job, so except you are a talented expert with ample capabilities within the trade, it turns into hard to get employed. earning certification in CompTIA A+will vicinity you in a higher position and presents stronger probabilities of getting hired.
  • Job Retention – With the giant advancement within the business of technology, greater groups are turning towards robotic automation to cut can charge the human efforts and make many of the equipment automized. americans with a minimal degree of advantage have greater possibilities of losing jobs during this volatile world to satisfy the economic state of affairs. So it's all the time a good idea to enhance your advantage in quite a few features and earn trade usual certifications like CompTIA A+. earning certifications painting your self as a competent player with knowledge and talents and increase greater possibility of staying within the enterprise for lengthy. 
  • Promotions –if you happen to are searching for a advertising, ensure that you are a qualified grownup for availing promotions. promoting expects pre-requisites and is obtainable only in case you have miraculous capabilities for your industry or have principal certifications like CompTIA A+to exhibit that you are more certified. many of the employers inevitably seek respectable certifications with enough abilities to present promotions to the worker. So earning this certification give extra potentialities of mountaineering the growth ladder and provide higher earning knowledge.
  • skilled credence – Salaries are incredibly individualized and rely upon dissimilar factors which are in fact advanced to bear in mind. although, if you are looking to raise the revenue averages, CompTIA A+certification supply a long function. people having certification are found to be extra valuable, and these certifications add expert credibility to the individual. earning one or more of these types of certificates demonstrates your motivation and dedication in opposition t the business and eventually possess a a hit boom to your profession.
  • Closing concepts

    CompTIA A+ 220-902 examrequires learning and applying an plentiful volume of guidance. This certification is gold standard suitable for entry-degree acquaintances and a good basis to set a career in information technology and networking. So, why you still wish to stay up for the probability to come to your means. Go grab the alternatives and make a a hit career in IT.

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    © 2019 Copyright PrepAway - All Rights Reserved

    Disclaimer: The above is a depend of opinion provided for typical assistance applications simplest and is not intended as funding tips. counsel and evaluation above are derived from sources and utilising methods believed to be official, but we can't accept accountability for any losses you may additionally incur because of this analysis. individuals should still discuss with their personal economic advisors.

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    Vulnerabilities within the utility and Transport Layer of the TCP/IP stack | killexams.com Real Questions and Pass4sure dumps

    The Transport layer is accountable for conclusion-to-conclusion statistics communique and acts as an interface for community functions to entry the network. this sediment additionally takes care of error checking, flow control, and verification within the TCP/IP  protocol suite. The software Layer handles the particulars of a particular application and performs three leading initiatives- formatting information, proposing records and transporting facts.  in this tutorial, we are able to discover the various kinds of vulnerabilities in the application and Transport Layer.

    This article is an excerpt from a ebook written with the aid of Glen D. Singh, Rishi Latchmepersad titled CompTIA network+ Certification book

    This book covers all CompTIA certification examination topics in a straightforward-to-take note manner together with quite a lot of self-assessment eventualities for better coaching. This publication will no longer best put together you conceptually however will also support you move the N10-007 exam.

    Vulnerabilities within the software Layer

    here are one of the vital application layer protocols which we should still pay close attention to in our network:

  • File switch Protocol (FTP)
  • Telnet
  • relaxed Shell (SSH)
  • basic Mail transfer Protocol (SMTP)
  • area name system (DNS)
  • Dynamic Host Configuration Protocol (DHCP)
  • Hypertext transfer Protocol (HTTP)
  • every of these protocols changed into designed to provide the characteristic it turned into constructed to do and with a lesser center of attention on protection. Malicious users and hackers are in a position to compromise both the utility that makes use of these protocols and the community protocols themselves.

    cross site Scripting (XSS)

    XSS specializes in exploiting a weakness in sites. In an XSS attack, the malicious person or hacker injects customer-facet scripts into an internet web page/web page that a potential sufferer would have confidence. The scripts will also be JavaScript, VBScript, ActiveX, and HTML, or even Flash (ActiveX), which could be achieved on the sufferer’s gadget. These scripts may be masked as authentic requests between the internet server and the customer’s browser.

    XSS makes a speciality of right here:

  • Redirecting a sufferer to a malicious website/server
  • the usage of hidden Iframes and pop-up messages on the victim’s browser
  • data manipulation
  • data theft
  • Session hijacking
  • Let’s take a deeper examine what happens in an XSS assault:

  • An attacker injects malicious code into a web page/website that a possible sufferer trusts. A trusted site may also be a favourite browsing site, social media platform, or school or college web portal.
  • a potential victim visits the depended on website. The malicious code interacts with the sufferer’s net browser and executes. The internet browser is usually unable to verify no matter if the scripts are malicious or not and hence still executes the commands.
  • The malicious scripts can be used attain cookie suggestions, tokens, session tips, and so on about different sites that the browser has saved information about.
  • The obtained particulars (cookies, tokens, sessions id, etc) are sent lower back to the hacker, who in turn makes use of them to log in to the sites that the victim’s browser has visited:
  • There are two kinds of XSS assaults:

  • kept XSS (persistent)
  • reflected (non-persistent)
  • kept XSS (persistent): in this assault, the attacker injects a malicious script directly into the net software or a site. The script is stored permanently on the page, so when a possible sufferer visits the compromised page, the victim’s net browser will parse all of the code of the internet web page/utility exceptional. in a while, the script is done within the heritage with out the victim’s abilities. At this factor, the script is able to retrieve session cookies, passwords, and any other sensitive counsel stored within the person’s web browser, and sends the loot again to the attacker within the history.

    Reflective XSS (non-persistent): in this assault, the attacker always sends an email with the malicious link to the sufferer. When the victim clicks the hyperlink, it is opened in the sufferer’s net browser (reflected), and at this factor, the malicious script is invoked and begins to retrieve the loot (passwords, bank card numbers, and the like) saved in the victim’s web browser.

    SQL injection (SQLi)

    SQLi assaults focal point on parsing SQL instructions into an SQL database that doesn't validate the person enter. The attacker makes an attempt to profit unauthorized entry to a database either by means of creating or retrieving tips stored in the database software. nowadays, attackers don't seem to be best attracted to gaining access, however also in retrieving (stealing) counsel and promoting it to others for monetary benefit.

    SQLi will also be used to perform:

  • Authentication skip: allows the attacker to log in to a system devoid of a sound consumer credential
  • suggestions disclosure: Retrieves exclusive advice from the database
  • Compromise facts integrity: The attacker is in a position to manipulate counsel stored within the database
  • light-weight listing access Protocol (LDAP) injection

    LDAP is designed to question and replace directory capabilities, comparable to a database like Microsoft active directory. LDAP uses both TCP and UDP port 389 and LDAP uses port 636. In an LDAP injection attack, the attacker exploits the vulnerabilities within a web application that constructs LDAP messages or statements, which are according to the user enter. If the receiving utility doesn't validate or sanitize the user enter, this raises the opportunity of manipulating LDAP messages.

    move-web page Request Forgery (CSRF)

    This attack is a little bit comparable to the up to now outlined XSS attack. In a CSRF attack, the sufferer computer/browser is forced to execute malicious moves towards a domain with which the sufferer has been authenticated (a site that trusts the movements of the consumer).

    To have a much better knowing of how this attack works, let’s visualize a potential sufferer, Bob. On a daily day, Bob visits some of his favourite web sites, similar to quite a lot of blogs, social media systems, and so forth, the place he usually logs in instantly to view the content material. once Bob logs in to a particular web page, the web page would automatically trust the transactions between itself and the authenticated user, Bob. at some point, he receives an e mail from the attacker but unfortunately Bob doesn't recognise the email is a phishing/junk mail message and clicks on the link in the physique of the message. His web browser opens the malicious URL in a brand new tab:

    The assault would cause Bob’s desktop/internet browser to invoke malicious moves on the trusted website; the web site would see all the requests are originating from Bob. The return site visitors such as the loot (passwords, bank card particulars, consumer account, and so forth) can be returned to the attacker.

    Session hijacking

    When a user visits a website, a cookie is kept in the consumer’s web browser. Cookies are used to song the user’s preferences and manage the session while the person is on the site. whereas the consumer is on the website, a session id is additionally set within the cookie, and this tips could be persistent, which enables a person to shut the net browser after which later revisit the identical web page and immediately log in.

    besides the fact that children, the web developer can set how long the information is persistent for, whether it expires after an hour or every week, depending on the developer’s option. In a session hijacking assault, the attacker can try to reap the session identity while it is being exchanged between the competencies victim and the website. The attacker can then use this session identification of the victim on the web site, and this may enable the attacker to profit access to the sufferer’s session, extra permitting entry to the victim’s consumer account and so on.

    Cookie poisoning

    A cookie shops counsel about a user’s preferences while he/she is journeying a site. Cookie poisoning is when an attacker has modified a sufferer’s cookie, so we can then be used to gain private suggestions in regards to the sufferer similar to his/her identification.

    DNS disbursed Denial-of-provider (DDoS)

    A DDoS assault can occur in opposition t a DNS server. Attacker every so often goal internet carrier suppliers (ISPs) networks, public and personal domain identify device (DNS) servers, and so forth to steer clear of other respectable users from accessing the provider. If a DNS server is unable to tackle the amount of requests coming into the server, its performance will finally start to degrade step by step, unless it both stops responding or crashes. this is able to result in a Denial-of-provider (DoS) assault.

    Registrar hijacking

    every time an individual wants to buy a site, the adult has to complete the registration procedure at a site registrar. Attackers do are trying to compromise users money owed on various domain registrar sites within the hope of taking manage of the sufferer’s domains. With a site identify, distinct DNS information may also be created or modified to direct incoming requests to a selected machine. If a hacker modifies the A list on a site to redirect all site visitors to a compromised or malicious server, anyone who visits the compromised area will be redirected to the malicious site.

    Cache poisoning

    every time a consumer visits a website, there’s the procedure of resolving a host name to an IP handle which occurs within the background. The resolved information is kept within the local gadget in a cache area. The attacker can compromise this brief storage area and manipulate any extra resolution finished by means of the native gadget.

    Typosquatting

    McAfee outlined typosquatting, often known as URL hijacking, as a sort of cyber-assault that enables an attacker to create a website identify very near a company’s reputable domain name in the hope of tricking victims into journeying the fake website to either steal their personal tips or distribute a malicious payload to the victim’s gadget.

    Let’s take a glance at an easy example of this class of attack. in this scenario, we have a consumer, Bob, who generally makes use of the Google search engine to find his way across the internet. considering that Bob makes use of the www.google.com web site commonly, he units it as his homepage on the net browser so each time he opens the application or clicks the domestic icon, www.google.com is loaded onto the monitor. sooner or later Bob decides to make use of one other computing device, and the primary thing he does is decided his favorite search engine URL as his home web page. however, he typed www.gooogle.com and didn’t are aware of it. on every occasion Bob visits this website, it appears like the real web page. in view that the area became capable of be resolved to a domain, here's an example of how typosquatting works.

    It’s at all times advised to make use of a relied on search engine to find a URL for the web site you want to talk over with. relied on information superhighway search engine companies focus on blacklisting malicious and faux URLs in their search outcomes to assist give protection to information superhighway clients akin to your self.

    Vulnerabilities at the Transport Layer

    during this section, we are going to discuss a lot of weaknesses that exist inside the underlying protocols of the Transport Layer.

    Fingerprinting

    in the cybersecurity world, fingerprinting is used to find open ports and functions that are running open on the target gadget. From a hacker’s element of view, fingerprinting is carried out earlier than the exploitation section, because the more guidance a hacker can gain a couple of goal, the hacker can then slender its attack scope and use certain tools to increase the probabilities of correctly compromising the target computer.This approach is also used via device/community administrators, community protection engineers, and cybersecurity gurus alike. think about you’re a community administrator assigned to comfortable a server; apart from making use of device hardening ideas similar to patching and configuring entry controls, you may also should verify for any open ports that are not getting used.

    Let’s take a glance at a more useful approach to fingerprinting within the computing world. we have a goal computer, 10.10.10.a hundred, on our community. As a hacker or a network security professional, we would like to be aware of which TCP and UDP ports are open, the services that use the open ports, and the carrier daemon running on the goal device. In the following screenshot, we’ve used nmap to aid us discover the information we are seeking. The NMap tools delivers in particular crafted probes to a target machine:

    Enumeration

    In a cyber attack, the hacker makes use of enumeration suggestions to extract counsel in regards to the target device or network. This guidance will assist the attacker in determining system assault points. here are the a number of network features and ports that stand out for a hacker:

  • Port 53: DNS zone switch and DNS enumeration
  • Port 135: Microsoft RPC Endpoint Mapper
  • Port 25: fundamental Mail transfer Protocol (SMTP)
  • DNS enumeration

    DNS enumeration is where an attacker is trying to examine whether there are other servers or gadgets that raise the domain name of a company. Let’s take a glance at how DNS enumeration works. imagine we try to discover all of the publicly obtainable servers Google has on the internet. the usage of the host utility in Linux and specifying a hostname, host www.google.com, we will see the IP address 172.217.6.196 has been resolved successfully. This capability there’s a tool with a bunch name of www.google.com active. in addition, if we try and resolve the host identify, gmail.google.com, a different IP tackle is offered however once we try and get to the bottom of mx.google.com, no IP address is given. here's a demonstration that there isn’t an active device with the mx.google.com host identify:

    DNS zone transfer

    DNS zone transfer allows for the copying of the master file from a DNS server to yet another DNS server. there are times when administrators do not configure the protection settings on their DNS server effectively, which allows an attacker to retrieve the grasp file containing a listing of the names and addresses of a corporate network.

    Microsoft RPC Endpoint Mapper

    now not too long ago, CVE-2015-2370 turned into recorded on the CVE database. This vulnerability took competencies of the authentication implementation of the far flung technique name (RPC) protocol in quite a lot of types of the Microsoft home windows platform, both computing device and server operating systems. A a success make the most would permit an attacker to profit local privileges on a inclined gadget.

    SMTP

    SMTP is used in mail servers, as with the POP and the web Message access Protocol (IMAP). SMTP is used for sending mail, whereas POP and IMAP are used to retrieve mail from an email server. SMTP helps quite a few instructions, reminiscent of EXPN and VRFY. The EXPN command may also be used to verify no matter if a selected mailbox exists on a native gadget, while the VRFY command may also be used to validate a username on a mail server.

    An attacker can establish a connection between the attacker’s computer and the mail server on port 25. once a a hit connection has been dependent, the server will ship a banner again to the attacker’s computer displaying the server name and the fame of the port (open). as soon as this occurs, the attacker can then use the VRFY command followed with the aid of a user identify to determine for a legitimate user on the mail device the use of the VRFY bob syntax.

    SYN flooding

    one of the vital protocols that exist at the Transport Layer is TCP. TCP is used to establish a connection-oriented session between two devices that wish to verbal exchange or change data. Let’s recall how TCP works. There are two gadgets that are looking to change some messages, Bob and Alice. Bob sends a TCP Synchronization (SYN) packet to Alice, and Alice responds to Bob with a TCP Synchronization/Acknowledgment (SYN/ACK) packet. eventually, Bob replies with a TCP Acknowledgement (ACK) packet. here diagram indicates the TCP 3-means Handshake mechanism:

    For each TCP SYN packet acquired on a device, a TCP ACK packet have to be despatched returned in response. One category of assault that takes skills of this design flaw in TCP is known as a SYN Flood assault. In a SYN Flood assault, the attacker sends a continual circulate of TCP SYN packets to a goal device. this is able to cause the target machine to system each particular person packet and response hence; at last, with the high inflow of TCP SYN packets, the target gadget will become too overwhelmed and stop responding to any requests:

    TCP reassembly and sequencing

    right through a TCP transmission of datagrams between two contraptions, each and every packet is tagged with a sequence number by means of the sender. This sequence quantity is used to reassemble the packets again into records. throughout the transmission of packets, each and every packet may also take a special route to the vacation spot. This could cause the packets to be got in an out-of-order style, or in the order they had been despatched over the wire by using the sender.

    An attacker can try to wager the sequencing numbers of packets and inject malicious packets into the community destined for the target. When the target receives the packets, the receiver would assume they got here from the actual sender as they would include the applicable sequence numbers and a spoofed IP address.

    summary

    in this article, we have explored the several types of vulnerabilities that exist on the utility and Transport Layer of the TCP/IP protocol suite.

    To take into account different networking concepts like community architecture, protection, network monitoring, and troubleshooting; and ace the CompTIA certification examination, check out our booklet CompTIA community+ Certification book

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    Your next move: safety operations middle analyst | killexams.com Real Questions and Pass4sure dumps

    (this article is part of an IT career news collection referred to as “Your next circulation.” These articles take an interior look at the roles involving CompTIA certifications. each and every article will include the responsibilities, skills, related job titles and salary range for the role.)

    when you are decent in a crisis and have the power to scope out technological crimes and cyber incidents, then being a protection operations middle (SOC) analyst may be the right job for you.

    what's a security Operations core (SOC) Analyst?

    similar to cybersecurity analysts, SOC analysts are the primary responders to cyber-incidents. They document cyberthreats after which implement alterations to protect an organization.

    Job duties include:

  • deliver threat and vulnerability analysis
  • examine, doc and file on guidance safety considerations and rising trends
  • Analyze and respond to up to now undisclosed application and hardware vulnerabilities
  • put together organizational disaster restoration plans
  • Whereas a cybersecurity analyst may be the simplest cybersecurity skilled at a firm, SOC analysts are frequently a part of a large security operations group. The SOC analyst role is the remaining line of defense towards cybercriminals. with out them, hackers and other cyber criminals may also in no way be found.

    SOC analysts work alongside with cybersecurity engineers and security managers and certainly file to a primary suggestions protection officer (CISO).

    A SOC analyst should have a gentle and unshakable eye for element, as they ought to video display many things directly. They have to watch and reply to a few threats, and there may be diverse levels of responsibilities reckoning on how massive the enterprise is and how many SOC analyst’s it employs. From monitoring to reacting, a SOC analyst’s day is hardly the identical from one to the next.

    how to become a protection Operations center (SOC) Analyst

    Most groups hiring a SOC analyst are searching for someone with a bachelor’s degree in desktop science, cybersecurity or a connected field. Many SOC analysts up to now worked as community or methods administrators.

    A certification like CompTIA Cybersecurity Analyst (CySA+) can aid you gain the expertise you should become a SOC analyst. check out the CompTIA profession Roadmap to see what different certifications relate to cybersecurity jobs.

    The particulars

    SOC Analyst revenue range$50,000 to $seventy five,000, with a median annual wage of $seventy two,000 (Burning Glass technologies)

    Job Titles related to SOC Analyst

  • hazard intelligence analyst
  • Vulnerability analyst
  • Cybersecurity analyst
  • assistance security analyst or administrator
  • protection administrator
  • (This publish firstly regarded on the CompTIA IT Careers blog, which will also be considered here).


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    Importance of CompTIA A+ 220-902 Exam and A+ Certification | killexams.com real questions and Pass4sure dumps

    The Real Secret for Successful Trading

    Personal_Finance / Education Feb 06, 2019 - 05:25 AM GMT

    By: Submissions

    Personal_Finance

    In the fast-paced world, technology has changed the way we live and work.  Individuals who are planning for a career or thinking of a career, networking technology are sure to provide greater prospects. Computer networking has become an important part of the most business. To meet the requirements and work with much better networking degrees and certifications have now become mandatory. There is a multitude of training centers and online courses that offer these certifications. One such exam is CompTIA A+ 220-902 Exam.

    What is CompTIA A+ 220-902 Exam and why you need it?

    In order to gain knowledge in networking and operating systems and to build exception careers in information technology, CompTIA A+ 220-902 Exam occupies a wonderful part.

    CompTIA A+ 220-902 is a certification exam that covers PC hardware and peripherals, networking issues, mobile hardware, and troubleshooting.  This exam set a great foundation for your IT career and a successful line in networking. 

    Why you need IT Certifications?

    Before going in-depth about the features and the pros of the information technology and networking certifications, first, it is essential to know what the meaning of computer networking and network security is.

    Computer networking is a discipline in engineering that determine the interfacing two or more computing devices with each other through a proper communication channel. Computer networks are usually built with a combination of software and hardware. Likewise, when it comes to networking security, it is the practice of preventing and protecting illegal invasion in the business network.

    Large organizations have thousands of devices in a network; however, a lack of network security issues will result in huge chaos. Some of the common threats of network security are a virus, worms, spyware. When the business has a network that has no immune to these attacks, then the corporate has a potential risk of falling victim to data theft and sabotage. Therefore, network security is important than ever. However, your network security cannot be improved without having the best network security professional.

    These professionals earn certifications from networking exams like CompTIA A+ 220-902whodoes a multifaceted job. They maintain and integrate corporate WAN, LAN and server architecture. A+ certified professionals are highly responsible for implementing security plans and constantly monitor the networks from malicious threats.  But, what is the curriculum you need to cover and what topics you should be familiar to be CompTIA A+ certified professional?

    CompTIA A+ in a nutshell

    CompTIA A+ 220-902 exam majorly focusses on installing and configuring major operating systems like Windows, Android, iOS, Linux and Apple. However, you need to get familiarized with a multitude of aspects like mobile hardware, networking and troubleshooting, PC hardware and peripherals and extended knowledge of network security.

    Users can utilize plenty of materials available online. In addition, the CompTIA website provides training on various aspects and offer study materials to master in the exam. Individuals who wish to have classroom training can make use of their online session. After the completion of the training, you can take up a number of practice to test your understanding and to have a better perception about the CompTIA A+ 220-902 exam objectives.

    Successful completion of your exam can help you advance in your career, strengthen your IT skills and become a more qualified employee. Apart from these, there is a multitude of benefits of earning CompTIA A+certification.

    Incredible Benefits of gaining CompTIA A+ Certification

    In the latest research about networking investments conducted by top networking team of 700 networking experts, the results reveal that every organization requires highly skilled networking infrastructure professional to handle the increasing networking challenges and security issues.  So, individuals with these kinds of certifications are highly in demand.

    Some of the surprising benefits of CompTIA A+ certification are:

  • Easy to get hired – An IT professional skilled in multiple areas of networking will always be on the top of the list, and they will have more priority during job recruitments.  In this highly competitive world, where the amount of student graduated outweighs the amount of job, so unless you are a skilled professional with sufficient knowledge in the industry, it becomes hard to get hired. Earning certification in CompTIA A+will place you in a better position and offers greater chances of getting hired.
  • Job Retention – With the tremendous advancement in the industry of technology, more organizations are turning towards robotic automation to cut cost the human efforts and make most of the system automized. People with a minimal level of skills have more chances of losing jobs in this volatile world to meet the economic scenario. So it is always advisable to enrich your skills in various aspects and earn industry standard certifications like CompTIA A+. Earning certifications portray yourself as a competent player with skills and knowledge and enhance more chance of staying in the company for long. 
  • Promotions –When you are looking for a promotion, ensure that you are a qualified person for availing promotions. Promotion expects pre-requisites and is attainable only if you have extraordinary skills in your industry or have relevant certifications like CompTIA A+to show that you are more qualified. Many of the employers inevitably look for good certifications with sufficient skills to offer promotions to the employee. So earning this certification give more prospects of climbing the growth ladder and provide higher earning potential.
  • Professional credence – Salaries are highly individualized and depend on multiple factors that are really complex to understand. However, when you want to increase the salary averages, CompTIA A+certification provide an extended role. People having certification are found to be more valuable, and these certifications add professional credibility to the individual. Earning one or more of these kinds of certificates demonstrates your motivation and dedication towards the industry and eventually possess a successful growth to your career.
  • Closing Thoughts

    CompTIA A+ 220-902 examrequires learning and applying an abundant amount of information. This certification is best suited for entry-level associates and a great foundation to set a career in Information technology and networking. So, why you still want to wait for the opportunity to come to your way. Go grab the opportunities and make a successful career in IT.

    By PrepAway

    © 2019 Copyright PrepAway - All Rights Reserved

    Disclaimer: The above is a matter of opinion provided for general information purposes only and is not intended as investment advice. Information and analysis above are derived from sources and utilising methods believed to be reliable, but we cannot accept responsibility for any losses you may incur as a result of this analysis. Individuals should consult with their personal financial advisors.

    © 2005-2019 http://www.MarketOracle.co.uk - The Market Oracle is a FREE Daily Financial Markets Analysis & Forecasting online publication.


    Vulnerabilities in the Application and Transport Layer of the TCP/IP stack | killexams.com real questions and Pass4sure dumps

    The Transport layer is responsible for end-to-end data communication and acts as an interface for network applications to access the network. This layer also takes care of error checking, flow control, and verification in the TCP/IP  protocol suite. The Application Layer handles the details of a particular application and performs 3 main tasks- formatting data, presenting data and transporting data.  In this tutorial, we will explore the different types of vulnerabilities in the Application and Transport Layer.

    This article is an excerpt from a book written by Glen D. Singh, Rishi Latchmepersad titled CompTIA Network+ Certification Guide

    This book covers all CompTIA certification exam topics in an easy-to-understand manner along with plenty of self-assessment scenarios for better preparation. This book will not only prepare you conceptually but will also help you pass the N10-007 exam.

    Vulnerabilities in the Application Layer

    The following are some of the application layer protocols which we should pay close attention to in our network:

  • File Transfer Protocol (FTP)
  • Telnet
  • Secure Shell (SSH)
  • Simple Mail Transfer Protocol (SMTP)
  • Domain Name System (DNS)
  • Dynamic Host Configuration Protocol (DHCP)
  • Hypertext Transfer Protocol (HTTP)
  • Each of these protocols was designed to provide the function it was built to do and with a lesser focus on security. Malicious users and hackers are able to compromise both the application that utilizes these protocols and the network protocols themselves.

    Cross Site Scripting (XSS)

    XSS focuses on exploiting a weakness in websites. In an XSS attack, the malicious user or hacker injects client-side scripts into a web page/site that a potential victim would trust. The scripts can be JavaScript, VBScript, ActiveX, and HTML, or even Flash (ActiveX), which will be executed on the victim’s system. These scripts will be masked as legitimate requests between the web server and the client’s browser.

    XSS focuses on the following:

  • Redirecting a victim to a malicious website/server
  • Using hidden Iframes and pop-up messages on the victim’s browser
  • Data manipulation
  • Data theft
  • Session hijacking
  • Let’s take a deeper look at what happens in an XSS attack:

  • An attacker injects malicious code into a web page/site that a potential victim trusts. A trusted site can be a favorite shopping website, social media platform, or school or university web portal.
  • A potential victim visits the trusted site. The malicious code interacts with the victim’s web browser and executes. The web browser is usually unable to determine whether the scripts are malicious or not and therefore still executes the commands.
  • The malicious scripts can be used obtain cookie information, tokens, session information, and so on about other websites that the browser has stored information about.
  • The acquired details (cookies, tokens, sessions ID, and so on) are sent back to the hacker, who in turn uses them to log in to the sites that the victim’s browser has visited:
  • There are two types of XSS attacks:

  • Stored XSS (persistent)
  • Reflected (non-persistent)
  • Stored XSS (persistent): In this attack, the attacker injects a malicious script directly into the web application or a website. The script is stored permanently on the page, so when a potential victim visits the compromised page, the victim’s web browser will parse all the code of the web page/application fine. Afterward, the script is executed in the background without the victim’s knowledge. At this point, the script is able to retrieve session cookies, passwords, and any other sensitive information stored in the user’s web browser, and sends the loot back to the attacker in the background.

    Reflective XSS (non-persistent): In this attack, the attacker usually sends an email with the malicious link to the victim. When the victim clicks the link, it is opened in the victim’s web browser (reflected), and at this point, the malicious script is invoked and begins to retrieve the loot (passwords, credit card numbers, and so on) stored in the victim’s web browser.

    SQL injection (SQLi)

    SQLi attacks focus on parsing SQL commands into an SQL database that does not validate the user input. The attacker attempts to gain unauthorized access to a database either by creating or retrieving information stored in the database application. Nowadays, attackers are not only interested in gaining access, but also in retrieving (stealing) information and selling it to others for financial gain.

    SQLi can be used to perform:

  • Authentication bypass: Allows the attacker to log in to a system without a valid user credential
  • Information disclosure: Retrieves confidential information from the database
  • Compromise data integrity: The attacker is able to manipulate information stored in the database
  • Lightweight Directory Access Protocol (LDAP) injection

    LDAP is designed to query and update directory services, such as a database like Microsoft Active Directory. LDAP uses both TCP and UDP port 389 and LDAP uses port 636. In an LDAP injection attack, the attacker exploits the vulnerabilities within a web application that constructs LDAP messages or statements, which are based on the user input. If the receiving application does not validate or sanitize the user input, this increases the possibility of manipulating LDAP messages.

    Cross-Site Request Forgery (CSRF)

    This attack is a bit similar to the previously mentioned XSS attack. In a CSRF attack, the victim machine/browser is forced to execute malicious actions against a website with which the victim has been authenticated (a website that trusts the actions of the user).

    To have a better understanding of how this attack works, let’s visualize a potential victim, Bob. On a regular day, Bob visits some of his favorite websites, such as various blogs, social media platforms, and so on, where he usually logs in automatically to view the content. Once Bob logs in to a particular website, the website would automatically trust the transactions between itself and the authenticated user, Bob. One day, he receives an email from the attacker but unfortunately Bob does not realize the email is a phishing/spam message and clicks on the link within the body of the message. His web browser opens the malicious URL in a new tab:

    The attack would cause Bob’s machine/web browser to invoke malicious actions on the trusted website; the website would see all the requests are originating from Bob. The return traffic such as the loot (passwords, credit card details, user account, and so on) would be returned to the attacker.

    Session hijacking

    When a user visits a website, a cookie is stored in the user’s web browser. Cookies are used to track the user’s preferences and manage the session while the user is on the site. While the user is on the website, a session ID is also set within the cookie, and this information may be persistent, which allows a user to close the web browser and then later revisit the same website and automatically log in.

    However, the web developer can set how long the information is persistent for, whether it expires after an hour or a week, depending on the developer’s preference. In a session hijacking attack, the attacker can attempt to obtain the session ID while it is being exchanged between the potential victim and the website. The attacker can then use this session ID of the victim on the website, and this would allow the attacker to gain access to the victim’s session, further allowing access to the victim’s user account and so on.

    Cookie poisoning

    A cookie stores information about a user’s preferences while he/she is visiting a website. Cookie poisoning is when an attacker has modified a victim’s cookie, which will then be used to gain confidential information about the victim such as his/her identity.

    DNS Distributed Denial-of-Service (DDoS)

    A DDoS attack can occur against a DNS server. Attacker sometimes target Internet Service Providers (ISPs) networks, public and private Domain Name System (DNS) servers, and so on to prevent other legitimate users from accessing the service. If a DNS server is unable to handle the amount of requests coming into the server, its performance will eventually begin to degrade gradually, until it either stops responding or crashes. This would result in a Denial-of-Service (DoS) attack.

    Registrar hijacking

    Whenever a person wants to purchase a domain, the person has to complete the registration process at a domain registrar. Attackers do try to compromise users accounts on various domain registrar websites in the hope of taking control of the victim’s domain names. With a domain name, multiple DNS records can be created or modified to direct incoming requests to a specific device. If a hacker modifies the A record on a domain to redirect all traffic to a compromised or malicious server, anyone who visits the compromised domain will be redirected to the malicious website.

    Cache poisoning

    Whenever a user visits a website, there’s the process of resolving a host name to an IP address which occurs in the background. The resolved data is stored within the local system in a cache area. The attacker can compromise this temporary storage area and manipulate any further resolution done by the local system.

    Typosquatting

    McAfee outlined typosquatting, also known as URL hijacking, as a type of cyber-attack that allows an attacker to create a domain name very close to a company’s legitimate domain name in the hope of tricking victims into visiting the fake website to either steal their personal information or distribute a malicious payload to the victim’s system.

    Let’s take a look at a simple example of this type of attack. In this scenario, we have a user, Bob, who frequently uses the Google search engine to find his way around the internet. Since Bob uses the www.google.com website often, he sets it as his homepage on the web browser so each time he opens the application or clicks the Home icon, www.google.com is loaded onto the screen. One day Bob decides to use another computer, and the first thing he does is set his favorite search engine URL as his home page. However, he typed www.gooogle.com and didn’t realize it. Whenever Bob visits this website, it looks like the real website. Since the domain was able to be resolved to a website, this is an example of how typosquatting works.

    It’s always recommended to use a trusted search engine to find a URL for the website you want to visit. Trusted internet search engine companies focus on blacklisting malicious and fake URLs in their search results to help protect internet users such as yourself.

    Vulnerabilities at the Transport Layer

    In this section, we are going to discuss various weaknesses that exist within the underlying protocols of the Transport Layer.

    Fingerprinting

    In the cybersecurity world, fingerprinting is used to discover open ports and services that are running open on the target system. From a hacker’s point of view, fingerprinting is done before the exploitation phase, as the more information a hacker can obtain about a target, the hacker can then narrow its attack scope and use specific tools to increase the chances of successfully compromising the target machine.This technique is also used by system/network administrators, network security engineers, and cybersecurity professionals alike. Imagine you’re a network administrator assigned to secure a server; apart from applying system hardening techniques such as patching and configuring access controls, you would also need to check for any open ports that are not being used.

    Let’s take a look at a more practical approach to fingerprinting in the computing world. We have a target machine, 10.10.10.100, on our network. As a hacker or a network security professional, we would like to know which TCP and UDP ports are open, the services that use the open ports, and the service daemon running on the target system. In the following screenshot, we’ve used nmap to help us discover the information we are seeking. The NMap tools delivers specially crafted probes to a target machine:

    Enumeration

    In a cyber attack, the hacker uses enumeration techniques to extract information about the target system or network. This information will aid the attacker in identifying system attack points. The following are the various network services and ports that stand out for a hacker:

  • Port 53: DNS zone transfer and DNS enumeration
  • Port 135: Microsoft RPC Endpoint Mapper
  • Port 25: Simple Mail Transfer Protocol (SMTP)
  • DNS enumeration

    DNS enumeration is where an attacker is attempting to determine whether there are other servers or devices that carry the domain name of an organization. Let’s take a look at how DNS enumeration works. Imagine we are trying to find out all the publicly available servers Google has on the internet. Using the host utility in Linux and specifying a hostname, host www.google.com, we can see the IP address 172.217.6.196 has been resolved successfully. This means there’s a device with a host name of www.google.com active. Furthermore, if we attempt to resolve the host name, gmail.google.com, another IP address is presented but when we attempt to resolve mx.google.com, no IP address is given. This is an indication that there isn’t an active device with the mx.google.com host name:

    DNS zone transfer

    DNS zone transfer allows the copying of the master file from a DNS server to another DNS server. There are times when administrators do not configure the security settings on their DNS server properly, which allows an attacker to retrieve the master file containing a list of the names and addresses of a corporate network.

    Microsoft RPC Endpoint Mapper

    Not too long ago, CVE-2015-2370 was recorded on the CVE database. This vulnerability took advantage of the authentication implementation of the Remote Procedure Call (RPC) protocol in various versions of the Microsoft Windows platform, both desktop and server operating systems. A successful exploit would allow an attacker to gain local privileges on a vulnerable system.

    SMTP

    SMTP is used in mail servers, as with the POP and the Internet Message Access Protocol (IMAP). SMTP is used for sending mail, while POP and IMAP are used to retrieve mail from an email server. SMTP supports various commands, such as EXPN and VRFY. The EXPN command can be used to verify whether a particular mailbox exists on a local system, while the VRFY command can be used to validate a username on a mail server.

    An attacker can establish a connection between the attacker’s machine and the mail server on port 25. Once a successful connection has been established, the server will send a banner back to the attacker’s machine displaying the server name and the status of the port (open). Once this occurs, the attacker can then use the VRFY command followed by a user name to check for a valid user on the mail system using the VRFY bob syntax.

    SYN flooding

    One of the protocols that exist at the Transport Layer is TCP. TCP is used to establish a connection-oriented session between two devices that want to communication or exchange data. Let’s recall how TCP works. There are two devices that want to exchange some messages, Bob and Alice. Bob sends a TCP Synchronization (SYN) packet to Alice, and Alice responds to Bob with a TCP Synchronization/Acknowledgment (SYN/ACK) packet. Finally, Bob replies with a TCP Acknowledgement (ACK) packet. The following diagram shows the TCP 3-Way Handshake mechanism:

    For every TCP SYN packet received on a device, a TCP ACK packet must be sent back in response. One type of attack that takes advantage of this design flaw in TCP is known as a SYN Flood attack. In a SYN Flood attack, the attacker sends a continuous stream of TCP SYN packets to a target system. This would cause the target machine to process each individual packet and response accordingly; eventually, with the high influx of TCP SYN packets, the target system will become too overwhelmed and stop responding to any requests:

    TCP reassembly and sequencing

    During a TCP transmission of datagrams between two devices, each packet is tagged with a sequence number by the sender. This sequence number is used to reassemble the packets back into data. During the transmission of packets, each packet may take a different path to the destination. This may cause the packets to be received in an out-of-order fashion, or in the order they were sent over the wire by the sender.

    An attacker can attempt to guess the sequencing numbers of packets and inject malicious packets into the network destined for the target. When the target receives the packets, the receiver would assume they came from the real sender as they would contain the appropriate sequence numbers and a spoofed IP address.

    Summary

    In this article, we have explored the different types of vulnerabilities that exist at the Application and Transport Layer of the TCP/IP protocol suite.

    To understand other networking concepts like network architecture, security, network monitoring, and troubleshooting; and ace the CompTIA certification exam, check out our book CompTIA Network+ Certification Guide

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    Your Next Move: Security operations center analyst | killexams.com real questions and Pass4sure dumps

    (This article is part of an IT Career News series called “Your Next Move.” These articles take an inside look at the roles related to CompTIA certifications. Each article will include the responsibilities, qualifications, related job titles and salary range for the role.)

    If you are good in a crisis and have the drive to scope out technological crimes and cyber incidents, then being a security operations center (SOC) analyst could be the right job for you.

    What Is a Security Operations Center (SOC) Analyst?

    Similar to cybersecurity analysts, SOC analysts are the first responders to cyber-incidents. They report cyberthreats and then implement changes to protect an organization.

    Job duties include:

  • Provide threat and vulnerability analysis
  • Investigate, document and report on information security issues and emerging trends
  • Analyze and respond to previously undisclosed software and hardware vulnerabilities
  • Prepare organizational disaster recovery plans
  • Whereas a cybersecurity analyst may be the only cybersecurity professional at an organization, SOC analysts are generally part of a large security operations team. The SOC analyst role is the last line of defense against cybercriminals. Without them, hackers and other cyber criminals may never be found.

    SOC analysts work alongside with cybersecurity engineers and security managers and most likely report to a chief information security officer (CISO).

    A SOC analyst must have a steady and unshakable eye for detail, as they have to monitor many things at once. They must watch and respond to a number of threats, and there may be different levels of responsibilities depending on how big the company is and how many SOC analyst’s it employs. From monitoring to reacting, a SOC analyst’s day is rarely the same from one to the next.

    How to Become a Security Operations Center (SOC) Analyst

    Most companies hiring a SOC analyst are looking for someone with a bachelor’s degree in computer science, cybersecurity or a related field. Many SOC analysts previously worked as network or systems administrators.

    A certification like CompTIA Cybersecurity Analyst (CySA+) can help you gain the skills you need to become a SOC analyst. Check out the CompTIA Career Roadmap to see what other certifications relate to cybersecurity jobs.

    The Details

    SOC Analyst Salary Range$50,000 to $75,000, with a median annual wage of $72,000 (Burning Glass Technologies)

    Job Titles Related to SOC Analyst

  • Threat intelligence analyst
  • Vulnerability analyst
  • Cybersecurity analyst
  • Information security analyst or administrator
  • Security administrator
  • (This post originally appeared on the CompTIA IT Careers blog, which can be viewed here).



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