L2F Protocol

A protocol developed by Cisco as a mutual authentication tunneling mechanism. L2F does not offer encryption.
[view]

A point-to-point tunnel protocol developed by combining elements from PPTP and L2F. L2TP lacks a built-in encryption scheme but typically relies on IPSec as its security mechanism.
[view]

Virtual private networks that depend on services offered by phone companies of various nationalities.
[view]

Extent to which protective measures, techniques, and procedures must be applied to information systems and networks based on risk, threat, vulnerability, system interconnectivity considerations, and information assurance needs. Levels of protection are: 1. Basic: information system and networks requiring implementation of standard minimum security countermeasures. 2. Medium: information system and networks requiring layering of additional safeguards above the standard minimum security countermeasures. 3. High: information system and networks requiring the most stringent protection and rigorous security countermeasures.
[view]

A protocol in development by the IETF to support secure data exchange. Once completed, IPSec is expected to be widely deployed to implement virtual private networks (VPNs). IPSec supports two encryption modes: Transport and Tunnel. Transport mode encrypts the data portion (payload) of each packet but leaves the header untouched. Tunnel mode is more secure because it encrypts both the header and the payload. On the receiving side, an IPSeccompliant device decrypts each packet.
[view]