Technical information

You may come upon the term TCP/IP, or Transmission Control Protocol. TCP/IP is the series of

protocols used for sending data across the Internet. Sending a message across the Internet involves a

three-step process. First, a network computer breaks up the data that make up the message into

several smaller data packages, each of which conforms to a strict set of guidelines. These guidelines are

called TCP. Once the computer has properly prepared the packages, it sends them out for delivery. The

packets’ addresses, directions on how to deliver them, and other routing specifications are dictated by

the other set of guidelines mentioned earlier, Internet Protocol (IP). Because of the Internet’s

complexity, the packages may not travel together, even though they are bound for the same address,

and may even arrive at different times. Using TCP, the computer at the receiving end unscrambles the

packets and sorts the data to recreate the original message.

Using your modem to connect to an Internet service provider

or an online service

Once you have physically connected your modem to a phone line, you have several choices to make

before you can get to the Internet. First, you must connect to and open an account with an electronic

service provider. Providers fall generally into two categories: Internet service providers (ISP) and online

services. Each has its distinct qualities; both charge a fee for your account. Your Macintosh comes with

the Apple Internet Connection Kit (AICK), which helps you connect with an ISP. Your Macintosh may

also come with America Online (AOL), an online service available in some regions.

Connecting

to the Internet

or an Online

Service