4.4. Understanding Instant Messaging's Features
Instant messaging (IM) has become a hugely popular application on the Internet. Millions of users are estimated to be using instant messaging worldwide. America Online and Microsoft provide IM services to their subscribers. Their services are free and easily accessible.
IM users can send photos, play network games, conduct chats, send e-mail, and even have IM conferences. IM functionality in no small part explains its growth. Besides, it's just fun. Clients use software to connect to IM servers to communicate. These servers might be synchronized worldwide to allow instantaneous communications between any two users in the world. Figure 4.18 shows clients connecting to an IM server system similar ...
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