srue Thu, 08/02/2007 - 08:57
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L2TP is strictly a tunneling protocol. L2TP does not provide confidentiality or strong authentication by itself. IPsec is often used to secure L2TP packets by providing confidentiality, authentication and integrity. The combination of these two protocols is generally known as L2TP/IPsec.


http://en.wikipedia.org/wiki/Layer_2_Tunneling_Protocol

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