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Worldwide Availability of WAN Technologies

Jun 21,2009 by alperen

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Worldwide Availability of WAN Technologies

Technology Availability
Asynchronous dial-up Widely available
X.25 Widely available
ISDN Moderately available
Frame Relay Widely available
Leased lines Widely available
DSL Moderately available
Cable modem Widely available (U.S.)

Frequently, selecting another technology will increase overall costs; for example, a T-1 circuit
will cost substantially more than a standard analog connection at a remote location. Some
technologies provide high levels of bandwidth for relatively low cost. Frame Relay is an example
of one such technology.
Table 22.5 compares available bandwidth of common WAN technologies.

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