Definition
Layer 2 Forwarding protocol is an active network protocol that facilitates secure VPN connections. It runs at layer 2 (the OSI model’s data link layer) to ensure transparent data packet transmission between remote users and private networks.
Layer 2 Forwarding Protocol Use Cases
- Secure data transfer: The Layer 2 forwarding protocol protects data transfer between systems and locations, maintaining confidentiality and preventing unauthorized access, which is ideal for sensitive industries.
- Branch office connectivity: L2F creates secure connections between branch offices and headquarters, facilitating seamless communication, data transfer, and centralized management.
- Remote workforce: The L2F protocol connects remote workers to the corporate network, enabling access to resources and promoting productivity regardless of the location.
- Mobile connectivity: L2F enables mobile devices to connect to a VPN securely.
- Partner and vendor access: Layer 2 forwarding facilitates secure VPN connections for vendors, partners, or contractors requiring controlled access to specific network resources.
- Multi-site collaboration: The technology enables geographically dispersed sites to communicate and share resources securely, promoting unified network management and efficient data exchange.
How L2F Works
- Initiation stage: The L2F protocol kicks in when a user tries to connect to a private network via a VPN.
- Encapsulation: The Layer 2 forwarding encapsulates the user’s data packets within IP (internet protocol) or UDP (user datagram protocol), protecting the information from interception or unauthorized access.
- Transmission: The encapsulated data packets are sent to the VPN server over a public network, like the internet. The packets are disguised to ensure privacy and security in transit.
- Decryption and Forwarding: After the encapsulated packets reach the VPN server, they are decrypted and sent to the target private network.