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No matter which type of Internet service you want (dial-up, DSL broadband or cable broadband), you're going to need a modem of some kind. There are three basic types of modems:

Analog modems - All analog modems sold at Circuit City are 56K modems, the fastest possible for dial-up connections through conventional phone lines. Most current 56K modems support a worldwide standard called V.90 that ensures that your modem can talk to any other V.90 modem. Since most Internet service providers support this, having a V.90 modem lets you connect at your modem's top speed all the time.

Digital modems - DSL (digital subscriber line) uses regular telephone lines to deliver high-speed Internet access. A special modem in your computer, coupled with equipment at the phone company's central office, processes the data signal to squeeze large amounts of information through the lines. DSL can receive information at speeds of up to 1.5 to 6 Mbps, over 30 times the speed of an analog modem.

Cable modems - Cable modem service uses the cable television wiring in your home. Once installed, your cable Internet connection is on all the time. There's no need to dial up your ISP, and surfing the Web is as easy as clicking on an icon. Cable modem speeds are generally 500kbps to 1.5 Mbps (megabits per second; a megabit is 1000 kilobits).

Networking

Once you've determined how you're going to connect to the Internet, it's time to figure out which kind of network configuration best suits your needs. There are three types of networks: Ethernet, wireless and Powerline.

Ethernet - Ethernet networks offer the fastest data transfer rate available, from 10Mbps to 100Mbps. Because each PC on the network requires a connection through a cable, Ethernet networks don't provide much mobility. When more than two PCs are networked, a hub, switch, and/or router is required. When a network shares an Internet connection that originates from a cable/DSL modem, a router is required to share this high-speed connection.

Wireless - Wireless networks are convenient, allowing you to roam to all corners of your home without cables. Setting up wireless networks is easy, but the further the network travels from the "access point," the weaker the signal gets. However, this effect can be lessened by using a signal-boosting antenna. The most common is 802.11b (WiFi), which operates on a frequency of 2.4GHz, much like a cordless phone, with a data transfer rate of up to 11Mbps. The 802.11a standard operates at the 5GHz frequency and has a data transfer rate up to 54Mbps. 802.11a allows for streaming video, and causes less interference with cordless phones. There is also a new wireless networking option called Wireless-G, which features data transfer rates up to 54Mbps.

Powerline - Create a network by simply plugging into an electrical outlet. With Powerline networking, also called HomePlug, you can connect PCs to a regular electrical outlet after a simple setup, with a transfer rate of up to 14Mbps.