Layer 2 Forwarding Protocol
L2F, or Layer 2 Forwarding, is a tunneling protocol developed by Cisco Systems, Inc. to establish virtual private network connections over the Internet. L2F does not provide encryption or confidentiality by itself; It relies on the protocol being tunneled to provide privacy. L2F was specifically designed to tunnel Point-to-Point Protocol (PPP) traffic.
Read more about Layer 2 Forwarding Protocol: Use, L2F Packet Structure, Other VPN Protocols
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