1 The PPP Daemon is the userland part of the Point-to-Point Protocol. It works
2 in combination with a dedicated kernel network interface usually named ppp.
3 PPP is a very extensible protocol and pppd supports a large number of options,
4 including compression (through various algorithms), cryptography (Microsoft's
5 MPPE) and authentication (PAP, CHAP, Microsoft CHAP), provided the kernel has
6 the relevant back-ends in some cases.