Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 160
Q2321:
In HDLC, the acknowledgment travels _______ from the data.
A. in the same direction
B. in the opposite direction
C. in parallel
D. with the data
Correct Answer:
B
Chapter: 160
Q2322:
Which of the following is a key feature of the HDLC protocol?
A. It requires the receiver to be constantly active
B. It requires a flow control mechanism
C. It requires a large buffer for data storage
D. It uses byte-oriented communication
Correct Answer:
B
Chapter: 160
Q2323:
Fill in the blank: In the Stop-and-Wait protocol, after sending a frame, the sender waits for an acknowledgment before _______.
A. sending the next frame
B. terminating the communication
C. receiving a new frame
D. closing the link
Correct Answer:
A
Chapter: 160
Q2324:
Which of the following does HDLC use to implement data transmission?
A. Single frames
B. Bit frames
C. Byte frames
D. Bit-oriented frames
Correct Answer:
D
Chapter: 161
Q2325:
HDLC provides how many common transfer modes?
A. 1
B. 2
C. 3
D. 4
Correct Answer:
B
Chapter: 161
Q2326:
Which of the following is a transfer mode used in HDLC?
A. Asynchronous Unbalanced Mode
B. Asynchronous Balanced Mode
C. Synchronous Response Mode
D. Synchronous Unbalanced Mode
Correct Answer:
B
Chapter: 161
Q2327:
Which HDLC mode operates with a master-slave configuration?
A. Asynchronous Balanced Mode
B. Normal Response Mode
C. Balanced Synchronous Mode
D. Unnumbered Response Mode
Correct Answer:
B
Chapter: 161
Q2328:
In which HDLC mode can both devices send and receive independently?
A. Normal Response Mode
B. Unnumbered Mode
C. Asynchronous Balanced Mode
D. Supervisory Mode
Correct Answer:
C
Chapter: 161
Q2329:
Fill in the blank: HDLC uses _______ and ABM as its two main transfer modes.
A. Normal Routing Mode
B. Normal Response Mode
C. Advanced Balanced Mode
D. Active Bridging Mode
Correct Answer:
B
Chapter: 161
Q2330:
Which of the following best describes ABM (Asynchronous Balanced Mode)?
A. Only the master can initiate communication
B. Slave devices control the communication
C. All stations operate as equals and can send data independently
D. Used only in wireless LANs
Correct Answer:
C
Chapter: 161
Q2331:
Which of the following is NOT one of the three types of HDLC frames?
A. Information frames
B. Supervisory frames
C. Control frames
D. Unnumbered frames
Correct Answer:
C
Chapter: 161
Q2332:
Fill in the blank: HDLC defines _______ main types of frames for data communication.
A. 2
B. 3
C. 4
D. 5
Correct Answer:
B
Chapter: 161
Q2333:
What is the purpose of an I-frame in HDLC?
A. To send control information
B. To send acknowledgment
C. To carry user data
D. To initiate connection
Correct Answer:
C
Chapter: 161
Q2334:
Which frame type in HDLC is used for flow and error control?
A. I-frames
B. S-frames
C. U-frames
D. D-frames
Correct Answer:
B
Chapter: 161
Q2335:
What does an S-frame in HDLC primarily manage?
A. User data
B. Control functions and error handling
C. Connection setup
D. Address assignment
Correct Answer:
B
Chapter: 161
Q2336:
Fill in the blank: U-frames in HDLC are used for _______.
A. error correction and retransmission
B. flow control
C. link management and control
D. sequencing and addressing
Correct Answer:
C
Chapter: 161
Q2337:
Which of the following best describes the I-frame in HDLC?
A. It manages control data
B. It initiates handshake protocols
C. It is used to carry user information
D. It performs signal encoding
Correct Answer:
C
Chapter: 161
Q2338:
What is the main function of S-frames in HDLC?
A. To send user data
B. To perform encryption
C. To control and supervise data transfer
D. To establish physical connection
Correct Answer:
C
Chapter: 161
Q2339:
Which of the following HDLC frames is involved in acknowledgment and control?
A. I-frame
B. S-frame
C. U-frame
D. D-frame
Correct Answer:
B
Chapter: 161
Q2340:
Fill in the blank: HDLC frames are categorized as I-frame, S-frame, and _______.
A. R-frame
B. F-frame
C. C-frame
D. U-frame
Correct Answer:
D