Layer 2 Forwarding (L2F)

Layer 2 Forwarding Protocol. Protocol that supports the creation of secure virtual private dialup networks over the Internet.
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A network communications process that protects the contents of protocol packets by encapsulating them in packets of another protocol. Technology enabling one network to send its data via another network’s connections. Tunneling works by encapsulating a network protocol within packets carried by the second network. The use of authentication and encryption to set up virtual private networks (VPNs).
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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.
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Terminal Access Controller Access Control System Plus. An authentication protocol, often used by remoteaccess servers or single (reduced) signon implementations. TACACS and TACACS+ are proprietary protocols from CISCO®.
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<p>A unique approach to network operation, design, and management. The concept is based on the theory that the complexities of a traditional network with on-device configuration (i. e. , routers and switches) often force an organization to stick with a single device vendor, such as Cisco, and limit the flexibility of the network to changing physical and business conditions. SDN aims at separating the infrastructure layer (i. e. , hardware and hardware-based settings) from the control layer (i. e. , network services of data transmission management).</p><p>SDN is a broad and developing concept addressing the management of the various network components with the objective of providing a control plane to manage traffic on a more abstract level through direct management of network components.<br></p>
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