Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Chapter: 4
Q141:
What is the term for a hardware-specific packet format?
A. Segment
B. Packet
C. Block
D. Frame
Correct Answer:
D
Chapter: 4
Q142:
The term ‘frame’ is associated with which layer of network communication?
A. Hardware layer
B. Application layer
C. Transport layer
D. Session layer
Correct Answer:
A
Chapter: 4
Q143:
In a frame, what symbols typically denote the start and end of a transmission?
A. ACK and NAK
B. START and STOP
C. SOH and EOT
D. CTRL and ALT
Correct Answer:
C
Chapter: 4
Q144:
What is added between frames in practical framing to prevent delays?
A. Header byte
B. Checksum
C. Extra character
D. Length field
Correct Answer:
C
Chapter: 4
Q145:
Which of the following indicates a crash in the sending computer during transmission?
A. Missing SOH
B. Missing data
C. Missing EOT
D. Extra frame
Correct Answer:
C
Chapter: 4
Q146:
Framing in networks is needed to define _______.
A. Error rates
B. Traffic patterns
C. Packet priority
D. The beginning and end of a packet
Correct Answer:
D
Chapter: 4
Q147:
Without packets, a 5MB file transfer blocks the network for __________.
A. 2 minutes
B. 5 minutes
C. 12 minutes
D. 30 seconds
Correct Answer:
C
Chapter: 4
Q148:
Using packets, a 1000-byte packet on a 56Kbps link takes about __________ to transmit.
A. 0.14 seconds
B. 1 second
C. 0.5 seconds
D. 0.01 seconds
Correct Answer:
A
Chapter: 4
Q149:
The main advantage of dividing data into packets is to ________.
A. Improve audio quality
B. Support long-distance communication
C. Reduce processing time
D. Allow other computers to transmit without long delay
Correct Answer:
D
Chapter: 4
Q150:
What is the purpose of adding a header and tail in a frame?
A. Increase security
B. Mark start and end of data
C. Encrypt data
D. Compress data
Correct Answer:
B
Chapter: 4
Q151:
Which of the following best describes a ‘packet’?
A. A type of cable
B. Small block of data
C. A programming code
D. Network interface
Correct Answer:
B
Chapter: 4
Q152:
A 10MB file, if packetized and time-shared, can be transmitted in only ________ seconds.
A. 24
B. 2.8
C. 10
D. 12
Correct Answer:
B
Chapter: 4
Q153:
In practice, each frame includes ______ to maintain synchronization.
A. Stop bit
B. Extra character
C. Null character
D. Control bit
Correct Answer:
B
Chapter: 4
Q154:
A shared connection between multiple workstations avoids the need for ________.
A. Multiple physical connections
B. Encryption
C. Firewalls
D. Repeaters
Correct Answer:
A
Chapter: 5
Q155:
What is the purpose of byte stuffing in data transmission?
A. To encrypt data
B. To compress data
C. To prevent misinterpretation of control characters
D. To improve transmission speed
Correct Answer:
C
Chapter: 5
Q156:
Which characters are commonly replaced in byte stuffing using ESC prefixes?
A. Only numbers
B. Reserved bytes like SOH, EOT
C. All alphabets
D. Special symbols
Correct Answer:
B
Chapter: 5
Q157:
Byte stuffing is mainly used with ________.
A. Bit-oriented hardware
B. Character-oriented hardware
C. Wireless devices
D. Cloud servers
Correct Answer:
B
Chapter: 5
Q158:
Bit stuffing is used with ________.
A. Character-oriented hardware
B. Analog hardware
C. Bit-oriented hardware
D. Optical devices
Correct Answer:
C
Chapter: 5
Q159:
What is the purpose of parity checking?
A. To compress data
B. To encrypt messages
C. To detect errors in data transmission
D. To balance network load
Correct Answer:
C
Chapter: 5
Q160:
In even parity, the total number of 1’s in the data should be ________.
A. Odd
B. Even
C. Zero
D. Multiple of three
Correct Answer:
B