Remote-access users vary widely in their situations and needs. The type of network they use depends on their specific needs:

Corporate users in a branch office These users are connected back to a central office, usually by a Frame Relay or serial link. ISDN links can sometimes be used to back up the primary link. Of late, broadband technologies such as cable are also being used in branch offices.
Telecommuters working from home These users use a wide variety of technologies, including digital subscriber line (DSL), cable modems, and dialup links. Virtual private networks (VPNs) can also be employed by these users for added security.
Traveling users Also known as road warriors, they use dialup links and VPN technologies to connect to resources. They may also employ wireless technologies such as 802.11x for connectivity.