Which ICMP message is sent by the ping command to check whether a destination is reachable?
Options
- A. Echo Reply
- B. Echo Request
- C. Destination Unreachable
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. Echo Request
Detailed Explanation
Correct Answer: Echo Request
- Ping sends an ICMP Echo Request message to the destination.
- If the destination responds, it sends an ICMP Echo Reply.
- The request and reply help determine network reachability and round-trip time.