A Ping command uses which ICMP message types? (Choose three.)

The Ping command primarily utilizes two types of ICMP (Internet Control Message Protocol) messages: Echo Request and Echo Reply. When you issue a Ping command, your device sends an Echo Request message to the target host, which, upon receiving it, replies with an Echo Reply message. This exchange is fundamental to the functionality of the Ping command, which is primarily used to test connectivity between devices on a network.

The inclusion of Source Quench in option B, however, is misleading in this context. Source Quench messages are meant to inform a sender to reduce the rate of transmission because of congestion, which is not directly related to the primary function of testing connectivity that Ping serves through Echo Request and Echo Reply.

Given this, the most appropriate choice would combine the essential use of Echo Request and Echo Reply without mixing in unrelated ICMP functions. While options contain different combinations of ICMP message types, none correctly encapsulate the fundamental purpose of the Ping command as succinctly as the choice that contains only Echo Request and Echo Reply. However, if you're focusing solely on what is used for the actual Ping process, the inclusion of Source Quench dilutes the relevance of that answer.

In practical use, the functionality of the Ping command revolves around these two IC