CCNA Exam Prep Question of the Week

You are using a protocol analyzer to examine network traffic. Which is the true statement?

1. The protocol field identifies the type of application layer data.
2. The port number field identifies the transport layer protocol.
3. The type field identifies the transport layer protocol.
4. The type field identifies the network layer protocol.
5. The protocol field identifies the network layer protocol.

The correct answer is 4.

The type field in the (data link layer) frame identifies the network layer protocol (the type of packet). The protocol field in the (network layer) packet identifies the transport layer protocol. The port number field in the (transport layer) segment identifies the type of application layer data.

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Related Courses:
ICND1??????—??????Interconnecting Cisco Network Devices 1
ICND2??????—??????Interconnecting Cisco Network Devices 2
CCNAX??????—??????CCNA Boot Camp v1.1