CertiGuide to Network+  9  Chapter 0111: Wide Area Networking       9  VI  TCP/IP Encapsulation for High-Speed Internet Connections

Making Dedicated Access Look Like On-Demand 1 Pop Quiz 0111.01

The answer was another encapsulation protocol, PPPoE (PPP over Ethernet). PPPoE runs the PPP protocol over an Ethernet connection, in contrast to the original PPP, which runs it over a serial modem connection (usually a dialup modem)

PPPoE allows users to connect to their broadband ISP’s with Dial Up Networking the same way they’d connect to a POTS or ISDN ISP connection. It lets ISP’s use the tools that have worked with PPP users for years to validate logins and passwords, track network log in and log out … and even kick users off the network if they’ve been on it for too many consecutive hours using that connection.

Many but not all broadband ISP’s use PPPoE. For example, DSL-based ISP’s who make use of this technology include Ameritech and Earthlink. Because PPPoE technology improves resource management for ISP’s, expect to see it used by more and more ISP’s as broadband connections become more popular.

This concludes our discussion of common remote access technologies and protocols. Next, we will move into the area of network-to-network communications using wide area networking.

Making Dedicated Access Look Like On-Demand 1 Pop Quiz 0111.01