WGU D325 - Networks (CompTIA Network+) Certification Practice Exam | Complete 200-Question Test Bank with Answers & Detailed Rationales - Latest Update 2026

WGU D325 - Networks (CompTIA Network+
Certification Practice Exam) | Complete Test Bank
with 200 Questions, Answers & Rationales-Latest
Update 2026

Question 1
Where does a hub send data?
A. Only to the receiving system
B. Only to the sending system
C. To all the systems connected to the hub
D. Only to the server
Correct Answer: C
Rationale: A hub operates at Layer 1 (physical layer) and forwards data out to all
connected ports, regardless of the destination.


Question 2
What uniquely identifies every NIC?
A. IP address
B. Media access control address
C. ISO number
D. Packet ID number
Correct Answer: B
Rationale: The MAC (Media Access Control) address is a unique hardware identifier
burned into every network interface card (NIC).


Question 3
What Windows utility do you use to find the MAC address for a system?
A. ipconfig /all
B. ipcfg /all
C. ping
D. mac




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,Correct Answer: A
Rationale: The ipconfig /all command displays detailed IP configuration information,
including the MAC address (physical address).


Question 4
A MAC address is known as a(n) ______ address.
A. IP
B. Logical
C. Physical
D. OEM
Correct Answer: C
Rationale: The MAC address is also called the physical address because it is hardcoded
into the network interface hardware.


Question 5
A NIC sends data in discrete chunks called:
A. Segments
B. Sections
C. Frames
D. Layers
Correct Answer: C
Rationale: Data at the data link layer is organized into frames, which contain the
source and destination MAC addresses.


Question 6
Which MAC address begins a frame?
A. Receiving system
B. Sending system
C. Network
D. Router
Correct Answer: A
Rationale: The destination MAC address is placed first in the frame header so that the
receiving system can quickly determine if the frame is intended for it.




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,Question 7
A frame ends with a special bit called the frame check sequence (FCS). What does the
FCS do?
A. Cycles data across the network
B. Verifies that the MAC addresses are correct
C. Verifies that the data arrived correctly
D. Verifies that the IP address is correct
Correct Answer: C
Rationale: The FCS is a cyclic redundancy check (CRC) used to detect errors in the
transmitted data. It verifies that the data arrived intact.


Question 8
Which of the following is an example of a MAC address?
A. 0-255
B. 00-50-56-A3-04-0C
C. SBY3M7
D. 192.168.4.13
Correct Answer: B
Rationale: MAC addresses are 12 hexadecimal digits (6 bytes) typically displayed in
pairs separated by hyphens or colons.


Question 9
Which layer of the TCP/IP model controls the assembly and disassembly of data?
A. Application layer
B. Presentation layer
C. Session layer
D. Transport layer
Correct Answer: D
Rationale: The Transport layer (TCP/UDP) handles the segmentation of data at the
source and reassembly at the destination.


Question 10
Which layer of the OSI seven-layer model keeps track of a system's connections to send
the right response to the right computer?
A. Application layer
B. Presentation layer

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, C. Session layer
D. Transport layer
Correct Answer: C
Rationale: The Session layer manages sessions between applications, establishing,
maintaining, and terminating connections.


Question 11
Which of the following topologies requires termination?
A. Star
B. Bus
C. Mesh
D. Ring
Correct Answer: B
Rationale: Bus topology requires terminators at both ends of the cable to prevent
signal reflection.


Question 12
Star-bus is an example of a ______ topology.
A. Transitional
B. System
C. Hybrid
D. Rampant
Correct Answer: C
Rationale: Star-bus is a hybrid topology that combines star and bus topologies.


Question 13
Of the topologies listed, which one is the most fault-tolerant?
A. Point-to-point
B. Bus
C. Star
D. Ring
Correct Answer: C
Rationale: In a star topology, if one connection fails, the rest of the network remains
operational.



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