DSL

Definition:

DSL stands for digital subscriber line and provides a high speed connection to the Internet through a traditional phone line using a DSL modem.

Here's a word you may not know...

SSL

Short for Secure Sockets Layer, SSL is used to provide a secure connection between a user's computer and a web server. SSL ensures that confidential data such as credit card numbers are not compromised when transmitting over the Internet.

If a web page is secured using SSL there will typically be a padlock (or other similar) symbol displayed in the web browser.