Wide Area Network (WAN) Technologies

By and large, the LAN marketplace is dominated by one technology – Ethernet. When it comes to interconnecting multiple locations, however, a variety of different Wide Area Network technologies are available. The decision to use one of these technologies over another is usually based on a number of factors including cost, performance, reliability, and availability. In some cases, a company’s WAN will not be based on a single technology, but many. For example, an organization may choose to connect some offices in a permanent fashion, while having other offices connect using various dial-up techniques. In this chapter, you’ll take a look at many of the most common WAN technologies that you’ll need to be familiar with for the CCNA and CCDA exams, including those based on point-to-point, circuit switched, and packet-switched connections.

The material to be covered in this chapter includes:

  • Introduction to WAN technologies
  • High Level Data Link Control Protocol (HDLC)
  • Point-to-Point Protocol (PPP)
  • Integrated Services Digital Network (ISDN)
  • Frame Relay

Author: Dan DiNicolo

Dan DiNicolo is a freelance author, consultant, trainer, and the managing editor of 2000Trainers.com. He is the author of the CCNA Study Guide found on this site, as well as many books including the PC Magazine titles Windows XP Security Solutions and Windows Vista Security Solutions. Click here to contact Dan.