• PPP operate at layer-2 and layer-3. It uses HDLC frame format at layer-2 and uses IPv4 and IPv6 formats at layer-3. Other than IP, it supports other network layer protocols also. • In addition, it also has built in security mechanism such as PAP and CHAP. • It has CRC...
• Interoperation with PAP/CHAP • Proxy Before client and server communication starts secret key is shared between client and server. Following radius packet types are exchanged between client and server. • Access Request: Initiates by client to server. ...
The main difference between PAP and CHAP is that PAP uses a Two-Way Handshake and sends the password in clear-text form, whereas CHAP uses a Three-Way Handshake and never sends the password between the parties. As a result, CHAP is much more secure than PAP. PAP vs. CHAP: What’s th...