Cable and DSL have higher download speeds, but satellite systems are about 10 times faster than a normal modem. Firms that offer or plan to offer two-way satellite Internet include StarBand, Pegasus Express, Teledesic and Tachyon. Tachyon service is available today in the United States, Western Europe and Mexico. The key installation planning requirement is a clear view to the south , since the orbiting satellites are over the equator area. And, like satellite TV, trees and heavy rains can affect reception of the Internet signals.
Compression reduces the size of the data and the bandwidth.
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