DSL is technology that provides high speed Internet connection. DSL uses existing copper pair phone line wiring in conjunction with special hardware on the switch and user ends of the line. This special hardware allows for a continuous digital connection over the phone lines.
DSL allows user to receive data at 1.5 Mbps and send data at approximately 256 Kbps, though actual speed is determined by the proximity to the providers central office. DSL service is always on - users don't need to dial a connection to gain access to the Internet - and some services even allow users to use the same line for voice and data traffic.
Cable broadabnd is a high speed Internet access over the TV cable network. Cable operators provide broadband using the same coaxial cables that deliver pictures and sound to your TV set. They provide transmission speeds of 1.5 Mbps or more. The actual bandwidth for Internet service over a cable TV line is up to 27 Mbps on the download path to the subscriber with about 2.5 Mbps of bandwidth for interactive responses in the other direction. However, since the local provider may not be connected to the Internet on a line faster than a T-carrier system at 1.5 Mpbs, a more likely data rate will be close to 1.5 Mpbs.
Subscribers can access their cable modem service simply by turning on their computers without dialing-up an ISP. You can still watch cable TV while using it. Transmission speeds vary depending on the type of cable modem, cable network, and traffic load. Speeds are comparable to DSL.
Wireless broadabnd is a high speed Internet access using a radio link between the customer's location and the service provider's facility. Wireless Internet can be mobile or fixed. High speed wireless connections are now readily available on laptops, cell phones, and other mobile computing devices.
Wireless technologies using longer range directional equipment provide broadband service in remote or sparsely populated areas where DSL or cable modem service would be costly to provide. Speeds are generally comparable to DSL and cable modem. An external antenna is usually required.
Satellite broadabnd is a more expensive internet connection than others. Satellite service is used in locations where terrestrial Internet access is not available. Satellite Internet uses a satellite dish for two-way data communications.
Satellite Internet is much faster than DSL or cable. It does not require huge cabling or telephone connection. Speed is also constant as satellite Internet uses two way high speed Internet.