Which of the statements below about ICMP are true?

Question

Accepted Answer

ICMP is used by hosts and routers to communicate network-level information.

Accepted Answer

The TTL-expired message type in ICMP is used by the traceroute program.

Accepted Answer

ICMP messages are carried directly in IP datagrams rather than as payload in UDP or TCP segments.

Answer

ICMP communicates information between hosts and routers by marking bits in the IP header.

Answer

ICMP messages are carried in UDP segments using port number 86.

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