Reading-list#1

http://tools.ietf.org/html/rfc1661 - The Point-to-Point Protocol (PPP)
http://tools.ietf.org/html/rfc2153 - PPP Vendor Extensions
http://tools.ietf.org/html/rfc1994 - PPP Challenge Handshake Authentication Protocol (CHAP)
http://tools.ietf.org/html/rfc1334 - PPP Authentication Protocols
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http://tools.ietf.org/html/rfc2516 - A Method for Transmitting PPP Over Ethernet (PPPoE)
http://tools.ietf.org/html/rfc2684 - Multiprotocol Encapsulation over ATM Adaptation Layer 5
http://tools.ietf.org/html/rfc2131 - Dynamic Host Configuration Protocol
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http://tools.ietf.org/html/rfc2865 - RADIUS Remote Access Dial In User Service
http://tools.ietf.org/html/rfc2866 - RADIUS Accounting
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http://tools.ietf.org/html/rfc1321 - The MD5 Message-Digest Algorithm
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http://tools.ietf.org/html/rfc2661 - Layer Two Tunneling Protocol "L2TP"