title: how to create a WAN (Wide Area Network)?
body: <p>assume we have a company with 5 branches that are not in same city of a country. We want to connect this branches to each other via a WAN without connecting to the internet. Is it possible to transfer data through a dial-up  connection? Is it possible to create a peer-to-peer connection through a phone line? If yes, what technologies(software or hardware) needed? I need some advices to understand WAN networking.</p>