Internet Connectivity

Before you can get to 'computing' you've got to get connected. Learn about things like modem speed, broadband connections, T1 lines and satellite internet.

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Why the Difference in Speed With My Cable Modem?

One minute you're zipping along, the next, you can't get a page to load. What's the deal? Cable modems are part of a loop that begins at the cable company's central office, goes through a certain geographic area and returns to the central office.

Why the difference in speed with my cable modem?

It can be truly frustrating -- one minute you're zipping along just fine, the next, you can't get one page to load. What's causing the backup? Cable modems are part of a loop that begins at the cable company's central office, goes through a certain neighborhood or area, and comes back to the central office.

How Fiber Optics Work

Fiber-optic lines have revolutionized long-distance phone calls, cable TV and the Internet. It's a really cool technology that enables the long-distance transmission of data in light signals, and is probably used in more ways than you think.

How Interplanetary Internet Will Work

How far will the Internet go? The next phase of the Internet will take us to far reaches of our solar system and lay the groundwork for a communications system for manned missions to Mars and planets beyond.

How Cable Modems Work

Learn how a cable modem works and see how dozens of television channels plus any Web site out there can flow over a single coaxial cable into your home.

How DSL Works

When you connect to the Internet, you might connect through a regular modem, a local-area network connection, a cable modem or a digital subscriber line (DSL) connection. DSL is a very high-speed connection that uses the same wires as a regular telephone line.

How does a T1 line work?

What's so special about a T1 line? It means the phone company has brought a fiber optic line into your office that can carry data at a rate of 1.544 megabits per second!

How Modems Work

Much of the world still uses a standard modem to connect to the Internet. In this article, we'll start with the original 300-baud modems and progress all the way through to the ADSL configurations.


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