CompTIA Network+ — Domain Name System (DNS)

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Follow @ASM_Educational     (Domain Name System) The Internet’s system for converting alphabetic names into numeric IP addresses. For example, when a Web address (URL) is typed into a browser, DNS servers return the IP address of the Web server associated with that name. In this made-up example, the DNS converts the URL www.company.com into… Read more »

CompTIA Network+ — Networking Tools

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Follow @ASM_Educational   From Wikipedia   A. Cable Tester- A cable tester is an electronic device used to verify the electrical connections in a cable or other wired assembly. Generally, a cable tester consists of:   1. A source of electric current 2. A volt meter 3. A switching matrix used to connect the current… Read more »

CompTIA Network+ DNS Records Types

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Follow @ASM_Educational   From Wikipedia     Type Description Function A Address Record  Returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host,but it is also used for DNSBLs, storing subnet masks in RFC 1101, etc. CNAME  Canonical Name Record Alias of one name to another: the… Read more »

CompTIA Network+ Common Security Threats

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Source mc mcse Certification Resources     DoS (Denial of Service) – A DoS attack is a common type of attack in which false requests to a server overload it to the point that it is unable to handle valid requests, cause it to reset, or shut it down completely.

CompTIA Network+ Methods of User Authentication

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Source mc mcse Certification Resources     PKI (Public Key Infrastructure) – A public key infrastructure (PKI) is the combination of software, encryption technologies, processes, and services that enable an organization to secure its communications and business transactions.

CompTIA Network+ Network Access Security

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Source mc mcse Certification Resources     ACL (Access Control List) – An ACL is a table in an operating system or network device (such as a router) that denies or allows access to resources.

CompTIA Network+ Firewalls

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Source mc mcse Certification Resources     Application Layer vs. Network Layer – An application layer firewall works at the application layer of a protocol stack.

CompTIA Network+ Hardware Tools

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Source mc mcse Certification Resources     Cable Testers – Cable testers are electronic devices used to test a cable’s integrity by checking for opens and shorts which can cause connectivity problems.

CompTIA Network+ OSI model

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The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology.

CompTIA Network+ Install components of Wiring Distribution

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Vertical Cross Connect – is a location within a building where cables originate and / or are terminated, reconnected using jumpers or pass throughs or are connected to patch panels or other similar devices where the locations are from upper or lower floors in the building.

CompTIA Network+ Command Line Interface Tools

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Traceroute – A command-line troubleshooting tool that enables you to view the route to a specified host. This will show how many hops the packets have to travel and how long it takes. In Windows operating systems, the command used is “tracert”.