Question

What contains the destination and source port numbers used to identify Application-layer protocols, and is the Transport-layer data unit?

Answer 1

Segment

Step-by-step explanation:

Port numbers is a 16-bit number that identifies the application the data is bound for. The Destination and Source port are usually contained in the segment, particularly in the first word of the segment header. Accurate dissemination of data to and from the Application-layer protocols is an integral function of the Transport Layer services.