Editing Digital subscriber line (section)

==Protocols and configurations==
Many DSL technologies implement an [[Asynchronous Transfer Mode]] (ATM) [[abstraction layer|layer]] over the low-level [[bitstream]] layer to enable the adaptation of a number of different technologies over the same link.

DSL implementations may create [[bridging (networking)|bridge]]d or [[routed]] networks. In a bridged configuration, the group of subscriber computers effectively connect into a single [[subnetwork]]. The earliest implementations used [[DHCP]] to provide the [[IP address]] to the subscriber equipment, with [[authentication]] via [[MAC address]] or an assigned [[hostname]]. Later implementations often use [[Point-to-Point Protocol]] (PPP) to authenticate with a user ID and password.