CCNA FAQ: Point-to-Point WANs (Wide Area Network Connections) Question: Which of the following PPP authentication protocols authenticates a device on the other end of a link without sending any password information in clear text? a. MD5 b. PAP c. CHAP d. DES Answer: C. Of the possible answers, only PAP and CHAP are PPP authentication protocols. PAP sends the password as … [Read more...]
WAN Data Link Encapsulations
WAN Data Link Encapsulations After you have the Physical layer plugged in, you must move up to the Data Link WAN encapsulation. Just as with the Physical layer, a variety of standards are available for the data link connections. However, the choice of the Data Link protocol is usually much simpler. As long as your WAN connection supports the Data Link encapsulation you use and … [Read more...]