Computer Networks MCQs with Answers
Practice important Computer Networks MCQs with answers and explanations.
Multiple Choice Questions
Q1001: ICMP informational messages include:
- A: Echo request/reply
- B: Router discovery
- C: Address mask request/reply
- D: All of the above
View Answer
D
Q1002: IPv6 fragmentation header is inserted after:
- A: Base header
- B: Extension header
- C: Transport header
- D: Application header
View Answer
A
Q1003: Path MTU discovery must be dynamic because:
- A: Network speed changes
- B: Path may change during transmission
- C: IP addresses change
- D: Source changes
View Answer
B
Q1004: The next header field in IPv6 points to:
- A: First extension header
- B: Payload
- C: Data link layer
- D: Previous header
View Answer
A
Q1005: Multiple headers in IPv6 improve:
- A: Efficiency
- B: Flexibility
- C: Incremental development
- D: All of the above
View Answer
D
Q1006: The ICMP message “Time exceeded” indicates:
- A: Packet was delivered late
- B: TTL expired
- C: Fragmentation required
- D: Source quench
View Answer
B
Q1007: Which ICMP error message is sent when fragmentation is needed but not allowed?
- A: Source quench
- B: Time exceeded
- C: Fragmentation required
- D: Redirect
View Answer
C
Q1008: The ICMP “Redirect” message is used to:
- A: Inform host of better route
- B: Stop datagram delivery
- C: Inform about fragmentation
- D: Error reporting
View Answer
A
Q1009: ICMP “Source quench” message indicates:
- A: Source is sending too fast
- B: Packet is corrupted
- C: Packet is lost
- D: Route is unavailable
View Answer
A
Q1010: IPv6 fragmentation headers have a fixed size of:
- A: 40 octets
- B: 8 octets
- C: Variable size
- D: 128 bits
View Answer
C