Abstract
Point-to-Point Protocol (PPP) is a Layer 2 wide area network (WAN) protocol used for basic data encapsulation and transmission across a network. PPP is configured to work at the data link Open Systems Interconnection (OSI) layer and helps data transmission by utilizing a multiprotocol setup via the physical, data link, and network layers of the OSI model. PPP is commonly used to encapsulate a connection on a Transmission Control Protocol/Internet Protocol (TCP/IP) based network through a modem and a telephone line, a router connected to another router, and via other connection methods and media. Challenge Handshake Authentication Protocol (CHAP) is the preferred protocol, because CHAP uses a three-way handshake, whereas Password Authentication Protocol uses only a two-way handshake. When CHAP is used over a WAN connection the router receiving the connection sends a challenge, which includes a random number. This random number is input into a Message Digest authentication algorithm to provide an encryption key. This key is then used to send authentication information between Routers 1 and 2. CHAP uses encryption and has a verification mechanism in place so it is an inherently secured protocol.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
