Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2121: Fill in the blank: In checksum, overflow bits are usually ______.
- A: dropped
- B: counted twice
- C: added back into the sum
- D: stored separately
View Answer
C
Q2122: What is the key limitation of checksum technique?
- A: Complexity
- B: Does not detect all error types
- C: Slow speed
- D: Requires special hardware
View Answer
B
Q2123: What does checksum rely on to detect changes in message content?
- A: Data routing
- B: IP configuration
- C: Summing known values
- D: Encryption technique
View Answer
C
Q2124: What is the main drawback of retransmission in real-time multimedia?
- A: It increases video quality
- B: It is slow and causes delays
- C: It reduces error detection
- D: It increases redundancy
View Answer
B
Q2125: Fill in the blank: In real-time multimedia, errors must be ______.
- A: reported
- B: retransmitted
- C: ignored
- D: corrected or reproduced
View Answer
D
Q2126: Which method is commonly used instead of retransmission in real-time applications?
- A: Cyclic Redundancy Check
- B: Forward Error Correction
- C: Simple parity check
- D: Back error detection
View Answer
B
Q2127: What does "Forward Error Correction" primarily focus on?
- A: Re-sending packets
- B: Correcting errors at receiver end
- C: Encrypting data
- D: Compressing packets
View Answer
B
Q2128: Fill in the blank: Forward Error Correction techniques send ______ along with original data.
- A: retransmission requests
- B: error requests
- C: redundant bits
- D: encryption keys
View Answer
C
Q2129: Which of the following techniques is used to **avoid** retransmission?
- A: Automatic Repeat reQuest (ARQ)
- B: Simple parity
- C: Forward Error Correction
- D: Cyclic code
View Answer
C
Q2130: What mathematical concept is used in Forward Error Correction?
- A: Binary trees
- B: Hamming Distance
- C: Frequency analysis
- D: IP routing
View Answer
B