Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2171: Which layer of the OSI model is responsible for Data Link Control services?
- A: Application
- B: Transport
- C: Network
- D: Data Link
View Answer
D
Q2172: What happens if there is no framing in data communication?
- A: Improved transmission speed
- B: No need for addressing
- C: Receiver cannot differentiate data
- D: Frames become more secure
View Answer
C
Q2173: Which function in DLC helps acknowledge the sender after successful frame reception?
- A: Error detection
- B: Destination addressing
- C: Source addressing
- D: Acknowledgment generation
View Answer
D
Q2174: What aspect of DLC services deals with retransmission of lost or corrupted frames?
- A: Framing
- B: Flow Control
- C: Error Control
- D: Addressing
View Answer
C
Q2175: What is the first step in preparing data for transmission in the Data Link Layer?
- A: Encryption
- B: Framing
- C: Multiplexing
- D: Segmentation
View Answer
B
Q2176: Fill in the blank: Flow control avoids ______ at the receiver's end.
- A: Timeouts
- B: Overflows
- C: Underflows
- D: Duplications
View Answer
B
Q2177: Which of the following statements is TRUE about DLC services?
- A: They are implemented at the Transport layer
- B: They manage end-to-end node communication
- C: They ensure reliable link-level data transfer
- D: They compress data packets
View Answer
C
Q2178: In the postal system analogy, which component resembles the sender address in data communication?
- A: Stamp
- B: Return Address
- C: Destination Barcode
- D: Priority Code
View Answer
B
Q2179: Why is using one big frame NOT recommended in data transmission?
- A: Increases transmission speed
- B: Prevents packet loss
- C: Makes error recovery harder
- D: Improves security
View Answer
C
Q2180: Frames can be of ________.
- A: only fixed size
- B: only variable size
- C: fixed or variable size
- D: small size only
View Answer
C