Principles of Information Systems, Eighth Edition17 Digital Subscriber Line (DSL)‏ Telecommunications technology that delivers high- bandwidth information to homes and small businesses over ordinary copper telephone wires Asymmetric DSL (ADSL): ความเร็วในการ download สูกว่า upload Symmetric DSL (SDSL): ความเร็วในการรับและส่ง ข้อมูลเท่ากัน –Does not allow you to use the phone at the same time
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