Nokia 4A0-113 Question Answer
In an IP datagram, which field identifies the receiving application?
The protocol field of the transport layer header
The port field of the transport layer header
The protocol field of the network layer header
The port field of the network layer address
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Protocol Fundamentals:
“The port field in the transport layer header (TCP/UDP) identifies the specific receiving application.”
Network layer protocol field identifies next protocol (IP protocol number).
Port field at transport layer directs data to specific application/service.
Thus, correct answer is B.
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TESTED 02 Jan 2026
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