Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2241: Fill in the blank: When using error control, a corrupted frame is _______.
- A: forwarded to application layer
- B: retransmitted automatically
- C: silently discarded
- D: delayed in buffer
View Answer
C
Q2242: What is the role of acknowledgment in CRC-based error control?
- A: It confirms corruption
- B: It confirms delivery
- C: It checks parity
- D: It validates encryption
View Answer
B
Q2243: Which of the following is TRUE about connectionless data link protocols?
- A: Frames are numbered
- B: Frames are linked
- C: Frames have no relationship
- D: Frames require acknowledgment
View Answer
C
Q2244: In a connection-oriented protocol, frames are usually _______.
- A: delivered without sequence
- B: randomly transmitted
- C: numbered and ordered
- D: encrypted before delivery
View Answer
C
Q2245: Fill in the blank: A data link control protocol may be either _______ or connection-oriented.
- A: peer-to-peer
- B: broadcast
- C: connectionless
- D: multicasting
View Answer
C
Q2246: Which of the following is NOT a feature of connection-oriented communication?
- A: Acknowledgment
- B: Frame numbering
- C: Session management
- D: Random frame transmission
View Answer
D
Q2247: What differentiates a connectionless protocol from a connection-oriented one?
- A: Encryption
- B: Type of medium
- C: Order and numbering of frames
- D: Frame size
View Answer
C
Q2248: Fill in the blank: In connection-oriented protocols, frames are sent in _______.
- A: chunks with random numbers
- B: single burst
- C: parallel order
- D: sequence and with numbers
View Answer
D
Q2249: Which error control method uses CRC and discards corrupted frames silently?
- A: Connection-oriented error handling
- B: CRC with acknowledgment
- C: CRC with parity checking
- D: CRC without acknowledgment
View Answer
D
Q2250: How many protocols are traditionally defined for flow and error control in the data-link layer?
- A: Two
- B: Four
- C: Three
- D: Five
View Answer
B