Windows supports two types of remote clients: dial-up and Virtual Private Networking. (Dial-up typically uses standard asynchronous, modems and telephone lines while VPNs uses the internet as the medium connecting the client to the remote access server.)
Remote Network Access (client/server application)
DirectAccess
Remote access solution for an enterprise network
In today’s networking world, hardware and telephone cost and the ubiquity of high speed internet connections have caused dial-up remote connections to be almost entirely replaced by virtual private networks.