H35-210_V2.5 · Question #121
What kind of ICMP messages are used by the PING command?
The correct answer is A. ICMP Echo Request message B. ICMP Echo Reply packet. PING operates by sending an ICMP Echo Request (Type 8) from the source host to a destination, which responds with an ICMP Echo Reply (Type 0) - both messages together complete one round trip, allowing measurement of reachability and latency. Both A and B are correct because…
Question
What kind of ICMP messages are used by the PING command?
Options
- AICMP Echo Request message
- BICMP Echo Reply packet
- CICMP timestamp request message
- DICMP address mask request message
How the community answered
(31 responses)- A81% (25)
- C6% (2)
- D13% (4)
Explanation
PING operates by sending an ICMP Echo Request (Type 8) from the source host to a destination, which responds with an ICMP Echo Reply (Type 0) - both messages together complete one round trip, allowing measurement of reachability and latency. Both A and B are correct because PING cannot function with just one; the request initiates the probe and the reply confirms the destination is reachable.
Option C (ICMP Timestamp Request, Type 13) is used for time synchronization between hosts, not connectivity testing. Option D (ICMP Address Mask Request, Type 17) is used to discover the subnet mask of a network interface, an entirely different purpose unrelated to PING.
Memory tip: Think of PING like a game of catch - you throw the ball (Echo Request) and the other person throws it back (Echo Reply). No throw, no catch, no PING.
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