Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 161
Q2341:
In HDLC, which frame type is primarily responsible for data transfer?
A. I-frame
B. S-frame
C. U-frame
D. C-frame
Correct Answer:
A
Chapter: 161
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
Correct Answer:
B
Chapter: 161
Q2343:
What type of framing mechanism does HDLC employ?
A. Character-oriented framing
B. Bit-oriented framing
C. Block framing
D. ASCII framing
Correct Answer:
B
Chapter: 161
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
Correct Answer:
B
Chapter: 161
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
Correct Answer:
C
Chapter: 161
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
Correct Answer:
B
Chapter: 161
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
Correct Answer:
C
Chapter: 162
Q2348:
Which protocol is most commonly used for point-to-point access?
A. HDLC
B. PPP
C. TCP
D. UDP
Correct Answer:
B
Chapter: 162
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
Correct Answer:
C
Chapter: 162
Q2350:
What layer of the OSI model does PPP operate at?
A. Network layer
B. Data-link layer
C. Physical layer
D. Application layer
Correct Answer:
B
Chapter: 162
Q2351:
Fill in the blank: PPP is designed to provide _______ access between two nodes.
A. point-to-multipoint
B. point-to-point
C. broadcast
D. full-duplex
Correct Answer:
B
Chapter: 162
Q2352:
Which of the following is a service provided by PPP?
A. Error correction
B. Flow control
C. Framing
D. Sequence numbering
Correct Answer:
C
Chapter: 162
Q2353:
Which of the following is NOT a service provided by PPP?
A. Framing
B. Authentication
C. Multilink support
D. Flow control
Correct Answer:
D
Chapter: 162
Q2354:
Which of the following services is included in PPP?
A. Error correction
B. Sequence numbering
C. Address configuration
D. Flow control
Correct Answer:
C
Chapter: 162
Q2355:
What does PPP use for detecting errors in transmission?
A. Checksum
B. CRC
C. Hamming code
D. Parity bit
Correct Answer:
B
Chapter: 162
Q2356:
Fill in the blank: PPP uses _______ to detect errors in the transmitted data.
A. CRC
B. Address bits
C. Flow labels
D. Sequence numbers
Correct Answer:
A
Chapter: 162
Q2357:
Which of the following features is NOT supported by PPP to keep it simple?
A. Framing
B. Link establishment
C. Flow control
D. Error detection
Correct Answer:
C
Chapter: 162
Q2358:
Fill in the blank: PPP does not include _______ to maintain simplicity.
A. Authentication
B. Address configuration
C. Error correction
D. Framing
Correct Answer:
C
Chapter: 162
Q2359:
Which service is provided by PPP for establishing communication?
A. Data transmission
B. Address routing
C. Link establishment
D. Multicast routing
Correct Answer:
C
Chapter: 162
Q2360:
What is a feature of PPP that helps manage multiple physical links?
A. Flow control
B. Multilink PPP
C. Packet sequencing
D. Error correction
Correct Answer:
B