DSL Stands for Digital Subscriber Line. DSL is types of an Internet Technology that uses the phone line to provide the internet to the user. User can make ca call while using phone at the same time. It's totally different from the Dial-Up DSL, in Dial-Up DSL user can't make a call while using internet but in DSL Internet Technology user can make a call while using the Internet.
In this technology user can get the High Speed Internet Connection from their telephones cable. It is much faster than the traditional Dial-Up DSL connections.