O'Reilly logo

31 Days Before Your CCENT Certification by Scott Bennett

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Day 3: WAN Connections

Table 1-26 describes the features of point-to-point, circuit-switched, and packet-switched WAN connections.

Table 1-26. WAN Connection Types

Image

The Cisco default encapsulation for a serial interface is High-Level Data Link Control (HDLC). However, you can change the encapsulation to PPP as a more flexible, nonproprietary encapsulation. In addition, PPP supports authentication in clear-text Password Authentication Protocol (PAP) or encrypted Challenge Handshake Authentication Protocol (CHAP). A router can also use Frame Relay as an encapsulation. Frame Relay virtual circuits use HDLC encapsulation, and each circuit is identified ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required