The various types of Internet connections:

• Dial-up Internet service is inexpensive, but it is slow. After the computer contacts a phone number, an internal or external modem connects to the Internet. This analogue signal is transformed to digital by the modem and routed over a public telephone network-connected landline. Interference occurs frequently on the lines, affecting the speed, which ranges from 28 to 56 kilometres per hour.
• Digital Subscriber Line (DSL) is the abbreviation for Digital Subscriber Line. It is a connection to the internet that is constantly 'on.' Because two lines are used, your phone will not be tethered when your PC is connected. To connect, you don't even need to dial a phone number. DSL employs a router to transfer data, with connection speeds ranging from 128K to 8 Mbps depending on the service.
• Cable operates over cable TV lines and provides an internet connection via a cable modem. There are variable speeds depending on whether you are uploading or downloading data. Speeds on cable range from 512K to 20 Mbps.
• Wireless, or Wi-Fi, connects to the internet without the use of telephone lines or wires, as the name implies. The speeds will vary, ranging from 5 Mbps to 20 Mbps.

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