What are the most commonly used WAN technologies?
Cable modem - dedicated
Dial-up - Older tech - but available everywhere
ISDN BRI- Moderately available - good HUB and Spoke - Dialup tech.
Leased line - to connect branch
DSL line to connect brach by VPN tech (really we can save cost,because in leased line it increase cost dramatically).- Admin cost are there.
frame-relay line: We can save hardware cost as well as admin cost)- But this is shared bandwidth.
ATM - layer-2 tech it is also good. cell bsed. fastest tech. Rarely available.
LASER GUNS: this is very useful to connect two building networks. distance max 2 miles.This for you one time cost but it is your permanent. NO requiring cost. One time 70K cost.But it saves 10K per month. with higher bandwidth that's additinal banifit.
I am starting to see more MPLS as well...it is supplanting ATM where practical.
adding one to the previous post:
1- lease line.
2- Frame Relay.
4- Metro ethernet.