WGU C172 Network and Security – Foundations Questions and Answers Latest Update Already Passed

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WGU C172 Network and Security – Foundations Questions and Answers Latest Update Already Passed protocol ✔✔The set of rules established for users to exchange information topology ✔✔The ne... twork architecture used to interconnect the networking equipment deterministic network ✔✔Each station connected to the network is ensured access for transmission of its messages at regular or fixed time intervals bus topology ✔✔The computers share the media (coaxial cable) for data transmission ThinNet ✔✔The coaxial cable used in a bus network. star topology ✔✔Twisted-pair cables connect the devices to a central hub or switch hub ✔✔A multiport repeater device used at the center of a star topology multiport repeater ✔✔The data it receives is broadcast and seen by all devices connected to its ports. A hub. broadcast ✔✔Transmission of data by a hub to all devices connected to its ports switch ✔✔Device used at the center of a star topology that forwards a frame it receives directly out the port associated with its destination address mesh topology ✔✔All networking devices are directly connected to each other, allows for full redundancy OSI model ✔✔The seven layers describing network functions Physical layer ✔✔Provides the electrical and mechanical connection to the network (cabling, NICs). 1st OSI layer Data link layer ✔✔Handles error recovery, flow control (synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer Network layer ✔✔Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information (IP, IPX). 3rd OSI layer Transport layer ✔✔Concerned with message integrity between source and destination (TCP, UDP). 4th OSI layer Session layer ✔✔Provides the control functions necessary to establish, manage, and terminate the connections (NSF, SQL). 5th OSI layer Presentation layer ✔✔Accepts and structures the messages for the application (ASCII, JPEG). 6th OSI layer Application layer ✔✔Interacts with application programs that incorporate a communication component such as your Internet browser and email (HTTP, FTP, SMTP). 7th OSI layer 3 basic steps to isolate network problem ✔✔Is the connection to the machine down? (layer 1) Is the network down? (layer 3) Is a service on a specific machine down? (layer 7) CSMA/CD ✔✔The Ethernet LAN media-access method, carrier sense multiple access with collision detection Ethernet ✔✔LAN protocol created in 1972 and standardized in 1980 using CSMA/CD. Frame ✔✔Contains the header, data, and trailer (the padding and 4-byte CRC frame check sequence) Frame header ✔✔Consists of the preamble, start frame delimiter, destination and source addresses, and length/type field 64 bytes ✔✔Minimum length of an Ethernet frame 1518 bytes ✔✔Maximum length of an Ethernet frame MAC address ✔✔A unique 6-byte/48-bit address assigned by the vendor of the network interface card displayed in 12 hex digits Organizationally unique identifier (OUI) ✔✔The first 3 bytes of the MAC address that identifies the manufacturer of the network hardware ipconfig /all ✔✔Enables the MAC address information to be displayed from the command prompt IANA ✔✔The agency that assigns IP addresses to computer networks IP address ✔✔Unique 32-bit address that identifies on which network the computer is located as well as differentiates the computer from all other devices on the same network Class A networks ✔✔Governments, very large networks. Range from 0.0.0.0 to 126.255.255.255. Example: 44.x.x.x Class B networks ✔✔Midsize companies, universities, and so on. Range from 128.0.0.0 to 191.255.255.255. Example: 128.123.x.x Class C networks ✔✔Small networks. Range from 192.0.0.0 to 223.255.255.255 Example: 192.168.1.x Class D networks ✔✔Reserved for multicast groups. Range from 224.0.0.0 to 239.255.255.255. Example: 224.x.x.x Class E networks ✔✔Experimental, not used on the Internet. Range from 240.0.0.0 to 254.255.255.255 Network number ✔✔The portion of the IP address that defines which network the IP packet is originating from or being delivered to Host number ✔✔The portion of the IP address that defines the location of the networking device connected to the network; also called the host address Host address ✔✔Another name for the host number ipconfig ✔✔Command used to display the computer's address Private addresses ✔✔IP addresses set aside for use in private intranets Intranet ✔✔An internal network that provides file and resource sharing but is not accessed from the Internet IP internetwork ✔✔A network that uses IP add [Show More]

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