Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 148
Q2161:
What is the key idea behind using XOR in Forward Error Correction?
A. Data duplication
B. Error detection without redundancy
C. Reconstruction of missing packets
D. Faster transmission
Correct Answer:
C
Chapter: 148
Q2162:
Which statement is TRUE about burst errors?
A. They can only be corrected with CRC
B. They cannot be corrected at all
C. They can be corrected using interleaved Hamming codes
D. They are ignored in multimedia
Correct Answer:
C
Chapter: 149
Q2163:
What does DLC stand for in computer networks?
A. Data Line Communication
B. Data Link Control
C. Digital Link Connection
D. Data Length Control
Correct Answer:
B
Chapter: 149
Q2164:
Which of the following is NOT a function of Data Link Control?
A. Framing
B. Flow Control
C. Error Control
D. Packet Routing
Correct Answer:
D
Chapter: 149
Q2165:
Fill in the blank: Data Link Control (DLC) handles communication between ______.
A. application layers
B. physical devices
C. adjacent nodes
D. remote servers
Correct Answer:
C
Chapter: 149
Q2166:
Which function of DLC ensures that data is sent at a rate the receiver can handle?
A. Framing
B. Error Control
C. Flow Control
D. Congestion Avoidance
Correct Answer:
C
Chapter: 149
Q2167:
What is the role of Error Control in DLC?
A. Prevents data duplication
B. Handles packet addressing
C. Detects and corrects errors
D. Controls data compression
Correct Answer:
C
Chapter: 149
Q2168:
What does the framing function in DLC involve?
A. Dividing the physical medium
B. Packing bits into identifiable frames
C. Encrypting messages
D. Prioritizing data frames
Correct Answer:
B
Chapter: 149
Q2169:
Fill in the blank: In framing, a message is separated by adding a ______ and a ______ address.
A. IP, MAC
B. Logical, Physical
C. Sender, Destination
D. Source, Port
Correct Answer:
C
Chapter: 149
Q2170:
In DLC, what ensures that one frame is distinguishable from another?
A. Error control
B. Addressing
C. Framing
D. Segmentation
Correct Answer:
C
Chapter: 149
Q2171:
Which layer of the OSI model is responsible for Data Link Control services?
A. Application
B. Transport
C. Network
D. Data Link
Correct Answer:
D
Chapter: 149
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
Correct Answer:
C
Chapter: 149
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
Correct Answer:
D
Chapter: 149
Q2174:
What aspect of DLC services deals with retransmission of lost or corrupted frames?
A. Framing
B. Flow Control
C. Error Control
D. Addressing
Correct Answer:
C
Chapter: 149
Q2175:
What is the first step in preparing data for transmission in the Data Link Layer?
A. Encryption
B. Framing
C. Multiplexing
D. Segmentation
Correct Answer:
B
Chapter: 149
Q2176:
Fill in the blank: Flow control avoids ______ at the receiver's end.
A. Timeouts
B. Overflows
C. Underflows
D. Duplications
Correct Answer:
B
Chapter: 149
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
Correct Answer:
C
Chapter: 149
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
Correct Answer:
B
Chapter: 150
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
Correct Answer:
C
Chapter: 150
Q2180:
Frames can be of ________.
A. only fixed size
B. only variable size
C. fixed or variable size
D. small size only
Correct Answer:
C