This article is all about how to configure PAP on cisco routers. In the previous article, we learn about how to create VLANs on cisco switches. Now in this tutorial, we learn about routers and their protocols. PAP is an authentication method that can be used over Point to Point link. Here we read a word Authentication that means you can use authentication to verify a router’s identity when it is connecting into your router options for authentication including CHAP and PAP. There are two authentication methods are present such as CHAP and PAP that can be used over Point to Point links. PAP is a simple and less secure method in comparison to the CHAP. In PAP authentication method password and username are sent in plain text, there is no encryption or protection. If it is accepted then the connection is allowed. PAP authentication method goes through two-way handshake process but it is not considered as a strong authentication protocol. In CHAP authentication method there is three-way handshake process and username and password are sent in encrypted form but still, PAP is a useful method. So let’s start here how to configure PAP on cisco routers.