Question

Which address is used to identify a process on a host by the transport layer?

(a) physical address

(b) logical address

(c) port address

(d) specific address

I have been asked this question at a job interview.

I want to ask this question from Reference Models topic in portion Computer Networks Introduction of Computer Network

Answer 1

The correct option is (c) port address

Easiest explanation: A port number is a way to identify a specific process to which an Internet or other network message is to be forwarded when it arrives at a server. Some examples of port numbers are port 20 which is used for FTP data, port 22 which is used for SSH remote login ,and port 23 which is used for TELNET.