Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 5
Q181:
Byte stuffing is an example of ________.
A. Data encryption
B. Data transmission
C. Data stuffing
D. Error correction
Correct Answer:
C
Chapter: 5
Q182:
Transmission errors are often caused by __________.
A. cloud storage
B. interference or power surges
C. network speed
D. user input
Correct Answer:
B
Chapter: 5
Q183:
In CRC, data is interpreted as a __________.
A. packet
B. stream
C. polynomial
D. table
Correct Answer:
C
Chapter: 5
Q184:
_________ and XOR are used in hardware implementation of CRC.
A. CPU
B. Shift register
C. Accumulator
D. Timer
Correct Answer:
B
Chapter: 5
Q185:
A major drawback of parity checking is its inability to detect ________.
A. any errors
B. multiple errors
C. even-bit errors
D. false bits
Correct Answer:
C
Chapter: 6
Q186:
What operation moves all bits one position to the left?
A. Rotate
B. Shift
C. Increment
D. Swap
Correct Answer:
B
Chapter: 6
Q187:
What does a shift register do in CRC hardware?
A. Encrypts data
B. Stores data temporarily
C. Shifts data bits
D. Multiplies bits
Correct Answer:
C
Chapter: 6
Q188:
What is the purpose of the XOR units in CRC computation?
A. To store data
B. To compress data
C. To perform division
D. To combine bits logically
Correct Answer:
D
Chapter: 6
Q189:
In CRC hardware, what is the initial value of the registers?
A. All 1s
B. All 0s
C. Random values
D. Alternating bits
Correct Answer:
B
Chapter: 6
Q190:
How many shift registers are used in the 16-bit CRC hardware example?
A. 2
B. 3
C. 4
D. 5
Correct Answer:
B
Chapter: 6
Q191:
CRC can detect errors better than checksum in case of ________.
A. Simple errors
B. Vertical and burst errors
C. Random errors
D. Even errors
Correct Answer:
B
Chapter: 6
Q192:
Which type of error damages the second bit of every character?
A. Burst error
B. Parity error
C. Vertical error
D. Cyclic error
Correct Answer:
C
Chapter: 6
Q193:
What type of error occurs due to a nearby lightning or electric motor startup?
A. Checksum error
B. Parity error
C. Vertical error
D. Burst error
Correct Answer:
D
Chapter: 6
Q194:
When a frame with CRC has an error, the receiver usually ______.
A. Forwards the frame
B. Stores the frame
C. Discards the frame
D. Corrects the frame
Correct Answer:
C
Chapter: 6
Q195:
CRC is calculated after ______.
A. Shifting all data bits
B. Receiving the data
C. Encrypting the data
D. Framing the data
Correct Answer:
A
Chapter: 6
Q196:
In direct point-to-point communication, each channel connects _______.
A. Multiple devices
B. Only one computer
C. Exactly two computers
D. A router and a switch
Correct Answer:
C
Chapter: 6
Q197:
What does a point-to-point communication form?
A. Star topology
B. Bus topology
C. Mesh topology
D. Ring topology
Correct Answer:
C
Chapter: 6
Q198:
How many connections are needed for 5 computers using direct point-to-point communication?
A. 10
B. 5
C. 15
D. 25
Correct Answer:
A
Chapter: 6
Q199:
Which is an advantage of point-to-point communication?
A. Limited scalability
B. Complex configuration
C. Easy to enforce security
D. Expensive setup
Correct Answer:
C
Chapter: 6
Q200:
Which of the following is a disadvantage of point-to-point networks?
A. Scalability
B. Privacy
C. Custom formats
D. High cost due to many connections
Correct Answer:
D