Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 3
Q121:
In half-duplex communication, data can flow
A. Only in one direction
B. One direction at a time
C. At the same time
D. Through multiple routers
Correct Answer:
B
Chapter: 3
Q122:
Telephone lines use _______ signals for communication.
A. Digital
B. Analog
C. Satellite
D. Infrared
Correct Answer:
B
Chapter: 3
Q123:
Wireless communication uses _______ media.
A. Guided
B. Controlled
C. Conductive
D. Unguided
Correct Answer:
D
Chapter: 3
Q124:
Computer networks allow _______ sharing.
A. Cost
B. File
C. Employee
D. Router
Correct Answer:
B
Chapter: 3
Q125:
The term “latency” in communication refers to _______.
A. Packet size
B. Time delay
C. Frequency
D. Range
Correct Answer:
B
Chapter: 3
Q126:
Routers operate at the ______ layer of the OSI model.
A. Transport
B. Network
C. Session
D. Physical
Correct Answer:
B
Chapter: 3
Q127:
A modem is used when connecting to the internet via _______.
A. Fiber
B. Cable
C. Telephone line
D. Router
Correct Answer:
C
Chapter: 3
Q128:
Protocols are sets of rules that allow devices to _______.
A. Execute commands
B. Communicate
C. Format data
D. Print documents
Correct Answer:
B
Chapter: 3
Q129:
A device that amplifies signals in long-distance transmission is called a ________.
A. Router
B. Repeater
C. Modem
D. Switch
Correct Answer:
B
Chapter: 3
Q130:
The purpose of a switch in a network is to ________.
A. Connect different networks
B. Boost signal
C. Filter spam
D. Forward data to specific devices
Correct Answer:
D
Chapter: 3
Q131:
Packets are reassembled in the correct order at the ______.
A. Sender
B. Receiver
C. Router
D. Modem
Correct Answer:
B
Chapter: 3
Q132:
Communication over a network requires a sender, receiver, message, medium, and ______.
A. Driver
B. Internet
C. Protocol
D. Server
Correct Answer:
D
Chapter: 3
Q133:
Signal interference is more common in ________ transmission.
A. Fiber
B. Optical
C. Wired
D. Wireless
Correct Answer:
D
Chapter: 4
Q134:
What is the main unit of data used in modern computer networks?
A. Bits
B. Frames
C. Packets
D. Blocks
Correct Answer:
C
Chapter: 4
Q135:
Why are packets used instead of continuous bit streams in networks?
A. To speed up transmission
B. To increase packet loss
C. To allow error detection and shared connections
D. To reduce hardware cost
Correct Answer:
C
Chapter: 4
Q136:
A file of 5MB transferred on a 56Kbps link without packetization would take approximately how long?
A. 3 minutes
B. 6 minutes
C. 12 minutes
D. 15 minutes
Correct Answer:
C
Chapter: 4
Q137:
Packets help ensure _______ among multiple computers using the same network.
A. Congestion
B. Fairness
C. Speed
D. Errors
Correct Answer:
B
Chapter: 4
Q138:
Each packet in a shared network ensures that no computer experiences a _______ delay.
A. Long
B. Short
C. Constant
D. Random
Correct Answer:
A
Chapter: 4
Q139:
Which of the following is a reason why shared networks must divide data into packets?
A. Reduce cost
B. Speed up RAM
C. Enable coordination and fairness
D. Reduce power usage
Correct Answer:
C
Chapter: 4
Q140:
Time Division Multiplexing (TDM) uses ______ to manage multiple transmissions.
A. Bits
B. Files
C. Frames
D. Packets
Correct Answer:
D