When using instant messaging (IM), all communication is directly between the users' two computers without the need of a server.

Question

Quizplus · Accepted Answer

Because your instant messaging client has the Internet address and port number for the computer of the person you addressed, your instant message is sent directly to the client on that person's computer. All communication is directly between the two computers without the need of a server.

When Using Instant Messaging (IM), All Communication Is Directly Between