This chapter presents technologies for the remote-access and wide-area network (WAN) components of an enterprise network design. The chapter discusses physical and data link layer protocols and enterprise network devices, such as remote-access servers, routers, firewalls, and virtual private network (VPN) concentrators.
The chapter begins with a discussion of the following remote-access technologies:
• Point-to-Point Protocol (PPP)
• Cable modems
• Digital subscriber line (DSL)
After discussing remote-access technologies, the chapter presents options for selecting WAN and remote-access capacities with the North American Digital Hierarchy, the European E system, or the Synchronous ...