TCP/IP, PPP, & Internet Connect
Your computer accesses the Internet via a TCP/IP connection. TCP/IP is a standard Internet protocol, or set of rules, for exchanging information.
A TCP/IP connection works like a pipeline. Once established, Internet applications—such as your Web browser and e-mail program—reach through the TCP/IP pipeline to get the information they need. When the information has been sent or received, it stops flowing through the pipeline. But the pipeline is not disconnected.
If you have a direct or network connection to the Internet, the Internet is accessible all the time. But if you connect via modem, you need to use Internet Connect software. This software, which comes with Mac OS, uses PPP to connect to TCP/IP networks ...
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