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http://sce.uhcl.edu/yang/teaching/.../VPN.ppt

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Layer 2 Tunneling Protocol

L2TP (according to TheFreeDictionary, http://computing-dictionary.thefreedictionary.com/L2TP)

A protocol from the IETF that allows a PPP session to travel over multiple links and networks.

L2TP is used to allow remote users access to the corporate network.

PPP is used to encapsulate IP packets from the user's PC to the ISP, and L2TP extends that session across the Internet.

L2TP was derived from Microsoft's Point-to-Point Tunneling Protocol (PPTP) and Cisco's Layer 2 Forwarding (L2F) technology.

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