WGU C172 EXAM STUDY GUIDE ACTUAL
EXAM SOLVED QUESTIONS 2026 100%
CORRECT.
◉ topology. Answer: The network architecture used to interconnect
the networking equipment
◉ deterministic network. Answer: Each station connected to the
network is ensured access for transmission of its messages at regular
or fixed time intervals
◉ bus topology. Answer: The computers share the media (coaxial
cable) for data transmission
◉ ThinNet. Answer: The coaxial cable used in a bus network.
◉ star topology. Answer: Twisted-pair cables connect the devices to a
central hub or switch
◉ hub. Answer: A multiport repeater device used at the center of a
star topology
◉ multiport repeater. Answer: The data it receives is broadcast and
seen by all devices connected to its ports. A hub.
, ◉ broadcast. Answer: Transmission of data by a hub to all devices
connected to its ports
◉ switch. Answer: 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. Answer: All networking devices are directly
connected to each other, allows for full redundancy
◉ OSI model. Answer: The seven layers describing network
functions
◉ Physical layer. Answer: Provides the electrical and mechanical
connection to the network (cabling, NICs). 1st OSI layer
◉ Data link layer. Answer: Handles error recovery, flow control
(synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer
◉ Network layer. Answer: Accepts outgoing messages and combines
messages or segments into packets, adding a header that includes
routing information (IP, IPX). 3rd OSI layer
◉ Transport layer. Answer: Concerned with message integrity
between source and destination (TCP, UDP). 4th OSI layer
, ◉ Session layer. Answer: Provides the control functions necessary to
establish, manage, and terminate the connections (NSF, SQL). 5th
OSI layer
◉ Presentation layer. Answer: Accepts and structures the messages
for the application (ASCII, JPEG). 6th OSI layer
◉ Application layer. Answer: 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. Answer: 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. Answer: The Ethernet LAN media-access method,
carrier sense multiple access with collision detection
◉ Ethernet. Answer: LAN protocol created in 1972 and standardized
in 1980 using CSMA/CD.
◉ Frame. Answer: Contains the header, data, and trailer (the padding
and 4-byte CRC frame check sequence)
, ◉ Frame header. Answer: Consists of the preamble, start frame
delimiter, destination and source addresses, and length/type field
◉ 64 bytes. Answer: Minimum length of an Ethernet frame
◉ 1518 bytes. Answer: Maximum length of an Ethernet frame
◉ MAC address. Answer: 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). Answer: The first 3
bytes of the MAC address that identifies the manufacturer of the
network hardware
◉ ipconfig /all. Answer: Enables the MAC address information to be
displayed from the command prompt
◉ IANA. Answer: The agency that assigns IP addresses to computer
networks
◉ IP address. Answer: 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. Answer: Governments, very large networks.
Range from 0.0.0.0 to 126.255.255.255. Example: 44.x.x.x
EXAM SOLVED QUESTIONS 2026 100%
CORRECT.
◉ topology. Answer: The network architecture used to interconnect
the networking equipment
◉ deterministic network. Answer: Each station connected to the
network is ensured access for transmission of its messages at regular
or fixed time intervals
◉ bus topology. Answer: The computers share the media (coaxial
cable) for data transmission
◉ ThinNet. Answer: The coaxial cable used in a bus network.
◉ star topology. Answer: Twisted-pair cables connect the devices to a
central hub or switch
◉ hub. Answer: A multiport repeater device used at the center of a
star topology
◉ multiport repeater. Answer: The data it receives is broadcast and
seen by all devices connected to its ports. A hub.
, ◉ broadcast. Answer: Transmission of data by a hub to all devices
connected to its ports
◉ switch. Answer: 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. Answer: All networking devices are directly
connected to each other, allows for full redundancy
◉ OSI model. Answer: The seven layers describing network
functions
◉ Physical layer. Answer: Provides the electrical and mechanical
connection to the network (cabling, NICs). 1st OSI layer
◉ Data link layer. Answer: Handles error recovery, flow control
(synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer
◉ Network layer. Answer: Accepts outgoing messages and combines
messages or segments into packets, adding a header that includes
routing information (IP, IPX). 3rd OSI layer
◉ Transport layer. Answer: Concerned with message integrity
between source and destination (TCP, UDP). 4th OSI layer
, ◉ Session layer. Answer: Provides the control functions necessary to
establish, manage, and terminate the connections (NSF, SQL). 5th
OSI layer
◉ Presentation layer. Answer: Accepts and structures the messages
for the application (ASCII, JPEG). 6th OSI layer
◉ Application layer. Answer: 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. Answer: 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. Answer: The Ethernet LAN media-access method,
carrier sense multiple access with collision detection
◉ Ethernet. Answer: LAN protocol created in 1972 and standardized
in 1980 using CSMA/CD.
◉ Frame. Answer: Contains the header, data, and trailer (the padding
and 4-byte CRC frame check sequence)
, ◉ Frame header. Answer: Consists of the preamble, start frame
delimiter, destination and source addresses, and length/type field
◉ 64 bytes. Answer: Minimum length of an Ethernet frame
◉ 1518 bytes. Answer: Maximum length of an Ethernet frame
◉ MAC address. Answer: 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). Answer: The first 3
bytes of the MAC address that identifies the manufacturer of the
network hardware
◉ ipconfig /all. Answer: Enables the MAC address information to be
displayed from the command prompt
◉ IANA. Answer: The agency that assigns IP addresses to computer
networks
◉ IP address. Answer: 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. Answer: Governments, very large networks.
Range from 0.0.0.0 to 126.255.255.255. Example: 44.x.x.x
