What this feature does Dial-up Networking allows you to access the Internet using a dial-up modem and a broadband technology, such as a cable modem and digital subscriber line (DSL). It also allows you to connect to private networks using a virtual private network (VPN) connection and Remote Access Service (RAS). RAS is a component that connects a client computer (typically your computer) to a host computer (also known as a remote access server) using industry standard protocols. VPN technologies allow users to connect to a private network, such as a corporate network, over the Internet.