Digital Subscriber Line (DSL) Internet is a technology that connects your home to the internet over telephone lines. While DSL is great for light internet use, such as web browsing or email, it is not recommended for activities that require significant speed. Multi-screen HD video streaming or multiplayer, and online gaming all require higher internet speed for an optimal experience. More recent technologies, such as VDSL and Fiber, can deliver much higher internet speeds, if they are available in your area.