S. A leased line modem also uses regular telephone wiring, like dial-up and DSL, but will not use the exact same network topology. Whilst dial-up takes advantage of a standard phone line and connects by way of the telephone switching technique, and DSL works by using a standard cellular phone https://erickgkkjh.mappywiki.com/1104307/5_tips_about_hpe_you_can_use_today