Which of the following ICMP messages will be generated if the destination port is not reachable?

Internet Control Message Protocol (ICMP) messages occur in many situations, such as
whenever a datagram cannot reach the destination or the gateway does not have the
buffering capacity to forward a datagram. Each ICMP message contains three fields: type,
code, and checksum. Different types of Internet Control Message Protocols (ICMPs) are
identified by a type and code field.

Which of the following ICMP messages will be generated if the destination port is not reachable?

Internet Control Message Protocol (ICMP) messages occur in many situations, such as
whenever a datagram cannot reach the destination or the gateway does not have the
buffering capacity to forward a datagram. Each ICMP message contains three fields: type,
code, and checksum. Different types of Internet Control Message Protocols (ICMPs) are
identified by a type and code field.

Which of the following ICMP messages will be generated if the destination port is not reachable?

A.
ICMP Type 11 code 1

B.
ICMP Type 5 code 3

C.
ICMP Type 3 code 2

D.
ICMP Type 3 code 3



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“D” ECSAv8 pg 92