Which RFC defines the Internet Control Message Protocol (ICMP)?

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Multiple Choice

Which RFC defines the Internet Control Message Protocol (ICMP)?

Explanation:
ICMP provides error reporting and diagnostic messaging within the IP layer, carried in IP datagrams and used for network troubleshooting and control. The specification for ICMP is defined in RFC 792, which lays out the message formats, types, and codes for signaling conditions like destination unreachable or time exceeded. The other RFCs listed define different core Internet protocols—IP itself (RFC 791), UDP (RFC 768), and TCP (RFC 793)—so they don’t define ICMP. Note that in IPv6, ICMP is defined separately (ICMPv6) in its own set of RFCs, but for IPv4, ICMP is defined by RFC 792.

ICMP provides error reporting and diagnostic messaging within the IP layer, carried in IP datagrams and used for network troubleshooting and control. The specification for ICMP is defined in RFC 792, which lays out the message formats, types, and codes for signaling conditions like destination unreachable or time exceeded. The other RFCs listed define different core Internet protocols—IP itself (RFC 791), UDP (RFC 768), and TCP (RFC 793)—so they don’t define ICMP. Note that in IPv6, ICMP is defined separately (ICMPv6) in its own set of RFCs, but for IPv4, ICMP is defined by RFC 792.

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