WGU Network and Security Foundations – C172 Exam Questions and Answers (Rated A+, Guaranteed Success)

WGU C172 Network and Security – Foundations Test
Questions and Answers Latest 2025\2026 Graded A+

protocol - ans The set of rules established for users to exchange
information



topology - ans The network architecture used to interconnect the
networking equipment



deterministic network - ans Each station connected to the network is
ensured access for transmission of its messages at regular or fixed time
intervals



bus topology - ans The computers share the media (coaxial cable) for
data transmission



ThinNet - ans The coaxial cable used in a bus network.

,star topology - ans Twisted-pair cables connect the devices to a central
hub or switch



hub - ans A multiport repeater device used at the center of a star
topology



multiport repeater - ans The data it receives is broadcast and seen by all
devices connected to its ports. A hub.



broadcast - ans Transmission of data by a hub to all devices connected to
its ports



switch - 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 - ans All networking devices are directly connected to
each other, allows for full redundancy



OSI model - ans The seven layers describing network functions

,Physical layer - ans Provides the electrical and mechanical connection to
the network (cabling, NICs). 1st OSI layer



Data link layer - ans Handles error recovery, flow control
(synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer



Network layer - 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 - ans Concerned with message integrity between source
and destination (TCP, UDP). 4th OSI layer



Session layer - ans Provides the control functions necessary to establish,
manage, and terminate the connections (NSF, SQL). 5th OSI layer



Presentation layer - ans Accepts and structures the messages for the
application (ASCII, JPEG). 6th OSI layer

, Application layer - ans d d d d Interacts with application programs that
d d d d




incorporate a communication component such as your Internet browser
d d d d d d d d d




and email (HTTP, FTP, SMTP). 7th OSI layer
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3 basic steps to isolate network problem - ans
d d d d d d d d d Is the connection to the
d d d d




machine down? (layer 1)
d d d d




Is the network down? (layer 3)
d d d d d




Is a service on a specific machine down? (layer 7)
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CSMA/CD - ans d d d The Ethernet LAN media-access method, carrier sense
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multiple access with collision detection
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Ethernet - ans d d d LAN protocol created in 1972 and standardized in 1980
d d d d d d d d




using CSMA/CD.
d d




Frame - ans d d d Contains the header, data, and trailer (the padding and 4-
d d d d d d d d d




byte CRC frame check sequence)
d d d d