Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2341: In HDLC, which frame type is primarily responsible for data transfer?
- A: I-frame
- B: S-frame
- C: U-frame
- D: C-frame
View Answer
A
Q2342: Which of the following HDLC modes is suitable for point-to-point communication with equal control?
- A: Normal Response Mode
- B: Asynchronous Balanced Mode
- C: Unnumbered Mode
- D: Supervisory Mode
View Answer
B
Q2343: What type of framing mechanism does HDLC employ?
- A: Character-oriented framing
- B: Bit-oriented framing
- C: Block framing
- D: ASCII framing
View Answer
B
Q2344: Which of the following modes in HDLC uses a primary-secondary relationship?
- A: Asynchronous Balanced Mode
- B: Normal Response Mode
- C: Unnumbered Mode
- D: Control Response Mode
View Answer
B
Q2345: Fill in the blank: In Normal Response Mode (NRM), communication is initiated by the _______.
- A: secondary device
- B: control frame
- C: primary device
- D: error handler
View Answer
C
Q2346: Which of the following is true about HDLC's Asynchronous Balanced Mode?
- A: Communication is limited to one direction at a time
- B: Devices share control equally
- C: Only secondary can initiate transmission
- D: It uses control-only frames
View Answer
B
Q2347: In HDLC, what does the term "framing" refer to?
- A: Encryption of packets
- B: Padding bits for error tolerance
- C: Encapsulating data into structured formats like I, S, and U frames
- D: Adding headers only
View Answer
C
Q2348: Which protocol is most commonly used for point-to-point access?
- A: HDLC
- B: PPP
- C: TCP
- D: UDP
View Answer
B
Q2349: Millions of Internet users use PPP to connect their home computers to what?
- A: Local network
- B: Printer
- C: Internet Service Provider
- D: Server room
View Answer
C
Q2350: What layer of the OSI model does PPP operate at?
- A: Network layer
- B: Data-link layer
- C: Physical layer
- D: Application layer
View Answer
B