For the most part I have tried to limit this glossary to Web terminology instead of delving into the realm of computer networking terminology.
Dedicated lines allow the highest speed data connections outside of a local network.
A 56K line was once standard. Once a long time ago, T-1 lines used to be the ethereal stuff that network administrators dreamed of. For large Web servers, however, even that is not powerful enough to handle all the traffic the Internet now generates. For a short time only, I am sure, T-3 lines are the connections to lust for.