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CompTIA Network+ N10-006 Quick Reference: WAN Technologies

Aug 13, 2015

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CompTIA Network+ N10-006 Quick Reference

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Dialup

Dialup Internet access uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line. The user’s computer or router uses an attached modem to encode and decode link layer frames and control information into and from audio frequency signals, respectively. Software of the computer encapsulates or extracts Internet protocol packets from the data stream. Despite the proliferation of high-speed Internet access (broadband), dialup Internet access can be used where other forms are not available, such as in rural or remote areas.

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