WGU C172 Network and Security – Foundations EXAM 2023 QUESTIONS AND ANSWERS ALREADY PASSED AND VERIFIED

protocol - CORRECT ANS The set of rules established for users to exchange information topology - CORRECT ANS The network architecture used to interconnect the networking equipment deterministic network - CORRECT ANS Each station connected to the network is ensured access for transmission of its messages at regular or fixed time intervals bus topology - CORRECT ANS The computers share the media (coaxial cable) for data transmission ThinNet - CORRECT ANS The coaxial cable used in a bus network. star topology - CORRECT ANS Twisted-pair cables connect the devices to a central hub or switch hub - CORRECT ANS A multiport repeater device used at the center of a star topology multiport repeater - CORRECT ANS The data it receives is broadcast and seen by all devices connected to its ports. A hub. broadcast - CORRECT ANS Transmission of data by a hub to all devices connected to its ports switch - CORRECT ANS 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 - CORRECT ANS All networking devices are directly connected to each other, allows for full redundancy OSI model - CORRECT ANS The seven layers describing network functions Physical layer - CORRECT ANS Provides the electrical and mechanical connection to the network (cabling, NICs). 1st OSI layer Data link layer - CORRECT ANS Handles error recovery, flow control (synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer Network layer - CORRECT ANS Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information (IP, IPX). 3rd OSI layer Transport layer - CORRECT ANS Concerned with message integrity between source and destination (TCP, UDP). 4th OSI layer Session layer - CORRECT ANS Provides the control functions necessary to establish, manage, and terminate the connections (NSF, SQL). 5th OSI layer Presentation layer - CORRECT ANS Accepts and structures the messages for the application (ASCII, JPEG). 6th OSI layer Application layer - CORRECT ANS 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 - CORRECT ANS 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 - CORRECT ANS The Ethernet LAN media-access method, carrier sense multiple access with collision detection