DSL (Digital Subscriber Line)

ADSL - Asymmetric DSL has different downloand and upload speeds most people download more than they upload so this tends to work for most users. Speeds are still very slow.

Symmetric DSL - works like a T1 with equal upload and downlaod speeds. Slower speeds overall

ADSL was popular so the speeds increased up to about 8 mbps.

Most hve moved to cable modem by now.

Very High Bit-Rate DSL (VDSL)

has a very high bitrate and can offer faster speeds 50 MB HAS TO BE CLOSE TO THE DSLAM. point of presestence that’s owned by the telephone company.