Refer to the exhibit. A network administrator is examining a NetFlow record. Why would the record indicate that both TRNS SOURCE PORT and TRNS DESTINATION PORT are 0?

Refer to the exhibit. A network administrator is examining a NetFlow record. Why would the record indicate that both TRNS SOURCE PORT and TRNS DESTINATION PORT are 0?

• The flow contains four packets and they use varying port numbers.
• The flow does not include transport layer protocols.
• The Gig0/0 interface has not transmitted any packets.
• The source host uses a different transport layer protocol from the one used by the destination host.

Explanation: The data flow recorded is ICMP traffic, indicated by the number 1 for IP PROTOCOL. Because ICMP is a Layer 3 protocol and has no need for a Layer 4 protocol such as TCP or UDP, the port numbers show a 0 within the NetFlow output.

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