December 2019
Beginner
510 pages
12h 7m
English
Content preview from Networking Fundamentals
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Digital Subscriber Line
Similar to ISDN, Digital Subscriber Line (DSL) provides a means of transmitting digital signals across the existing telephone network. Again a modem is required, but unlike ISDN a digital to analog conversion does take place. Although the data being transmitted is now an analog signal, both data and voice communications can take place simultaneously as the data is being transmitted at a higher frequency than the voice communications. Common forms of DSL are Asymmetric DSL (ADSL) and Symmetric DSL (SDSL):
- ADSL: Most homes utilized ADSL, so this became synonymous with the term DSL. ADSL offers a faster download speed than upload speed. This made sense at the time. Most home users would only be downloading from the internet, ...
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