A support technician uses the ping utility on a system that is online, yet no response is received. What should be allowed through a firewall, for ping to operate correctly?

The Internet Control Message Protocol (ICMP) should be allowed through a firewall, for ping to operate correctly.

ICMP (Internet Control Message Protocol) is a protocol that produces error messages to the Internet protocol address.This error reporting protocol (ICMP) is used for diagnostics and network management.Any network device using TCP/IP can send, receive, and/or process ICMP messages.

In conclusion, the Internet Control Message Protocol (ICMP) should be allowed through a firewall, for ping to operate correctly.

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