By definition Layer 2 Tunnel Protocol (L2TP) is "an emerging Internet Engineering Task Force (IETF) standard that combines the best features of two existing tunneling protocols: Cisco's Layer 2 Forwarding (L2F) and Microsoft's Point-to-Point Tunneling Protocol (PPTP). L2TP is an extension to the Point-to-Point Protocol (PPP), which is an important component for VPNs...
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L2TP is an extension to the Point-to-Point Protocol (PPP), which is an important component for VPNs. VPNs allow users and telecommuters to connect to their corporate intranets or extranets (Cisco)." L2TP is one of the major building blocks for VPNs (virtual private networks) and allows security for people communicating with each other over the network...
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OSI Model Security Memo The transport layer plays a major part with SSL and of course TLS (Transport Layer Security). These protocols use encryption and keys to ensure private connections...	2 / 402
Network Layers All routers will utilize IPSEC technology to ensure confidentiality of data transmitted. The preferred mode if IPSEC encryption is tunnel to encrypt both the data payload and the header information...	2 / 554
OSI Model The transport layer addresses the movement of data across the network. This layer is responsible for ensuring that the data from the session layer is delivered error-free and in the correct sequence to its destination...	3 / 709
Systems Analyst The networked coupled security favors the use of securing the networks infrastructure and the application-coupled security builds security into the applications themselves...	3 / 689