The other person gets your instant message and responds.All communication is directly between the two clients. In other words, the server is not involved at this point. Because your client has the IP address and port number for the computer of the person that you sent the message to, your message is sent directly to the client on that person's computer.You enter a message and click 'send' or hit return to communicate with that person. When your client gets the connection information for a person in your contact list, it changes the status of that person to 'online.' You click on the name of a person in your contact list who is online, and a window opens that you can enter text into.The server also sends your connection information to the people in your contact list that are signed on. If the server finds any of your contacts logged in, it sends a message back to the client on your computer with the connection information for that user.It then checks to see if any of the users in your contact list are currently logged in. The server creates a temporary file that has the connection information for you and the list of your contacts.It also provides the user with the names of everyone in your contacts list. The client sends the server the connection information ( IP address and number of the port assigned to the client) of the computer you are using.When the server verifies your name and password, you are logged in. If this is your first time on, you can sign up for an account and immediately begin using it. Once the client is connected to the server, you can enter your name and password to log in to the server.It uses a proprietary protocol for communication. The client tries to connect to the server.You install the software and open the client.You go to the download page and get a copy of the free software client for your computer.

Icq instant message