When you use the ping command to send ICMP messages across a network, what’s the most common request/reply pair you’ll see? (Select one answer choice)

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When you use the ping command to send ICMP messages across a network, what’s the most common request/reply pair you’ll see? (Select one answer choice)
A . Echo request and Echo reply
B . ICMP hold and ICMP send
C . ICMP request and ICMP reply
D . Echo off and Echo on

Answer: A