Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2101: Which of these is a common advantage of CRC over simple parity checks?
- A: Faster to implement
- B: Better compression
- C: Stronger encryption
- D: More robust error detection
View Answer
D
Q2102: What is the primary purpose of a checksum in networking?
- A: Encrypt data
- B: Compress data
- C: Detect errors
- D: Assign IP addresses
View Answer
C
Q2103: Which layer commonly uses checksum for error detection?
- A: Data-link layer
- B: Network layer
- C: Physical layer
- D: Application layer
View Answer
B
Q2104: Fill in the blank: A checksum is an ______ detection technique.
- A: error
- B: encryption
- C: address routing
- D: authentication
View Answer
A
Q2105: Where is the checksum technique MOSTLY used?
- A: Transport and network layers
- B: Data-link and physical layers
- C: Application and session layers
- D: Presentation and transport layers
View Answer
A
Q2106: What is the idea behind a traditional checksum?
- A: Count all characters in binary
- B: Divide message into equal frames
- C: Calculate and send sum of message parts
- D: Send encrypted message
View Answer
C
Q2107: Fill in the blank: In checksum, a value is calculated based on the ______.
- A: message length
- B: message content
- C: address type
- D: message format
View Answer
B
Q2108: Which of the following best describes the checksum concept?
- A: It hides data
- B: It adds redundant data
- C: It checks if data is lost
- D: It verifies integrity by summing values
View Answer
D
Q2109: What happens if the checksum values at sender and receiver do not match?
- A: Data is retransmitted
- B: Data is encrypted
- C: Error is ignored
- D: Error is accepted
View Answer
A
Q2110: Suppose a message is a list of five 4-bit numbers. What is sent along with the message?
- A: Their XOR
- B: Their average
- C: Their product
- D: Their sum
View Answer
D