What does ICMP Type 3/Code 13 mean?

A.
Host Unreachable

B.
Port Unreachable

C.
Protocol Unreachable

D.
Administratively Blocked

1 Answers



  1. teramin on Oct 06, 2012 Reply

    Answers: D
    _ Administratively Blocked

    Explanation:
    Answer A is incorrect, this would be a ICMP Type 3/Code 1 Answer B is incorrect, this would be a ICMP Type 3/Code 3 Answer C is incorrect, this would be a ICMP Type 3/CodeCm Answer D is correct. This is a destination unreachable message. When passing through a router that filters packets, code 13 is used to indicate that the packet was Administratively Blocked.

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