At the Transport layer of the OSI, what is used to find and communicate with a particular application running on a host?
A) IP addresses
B) port numbers
C) domain names
D) MAC addresses

Question

Quizplus · Accepted Answer

Port numbers are used to identify the specific application or process running on a host. When data is sent from one host to another, the source and destination ports are included in the header of the Transport layer protocol (either TCP or UDP) to ensure that the data is properly delivered to the correct application on the destination host. IP addresses identify the source and destination hosts, while domain names are used for human-friendly naming of hosts. MAC addresses are used at the Data Link layer for communication between devices on the same physical network.

At the Transport Layer of the OSI, What Is Used