tunneling protocol

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tunneling protocol

A network protocol that encapsulates packets at a peer level or below. It is used to transport multiple protocols over a common network as well as provide the vehicle for encrypted virtual private networks (VPNs). It is said to "tunnel" because it "pushes through" packets of different types.

Encapsulate Same or Lower Layer
In a regular protocol, the lower layer protocol encapsulates packets from the higher level protocol. For example, a network layer 3 packet encapsulates a transport layer 4 packet, and a data link layer 2 packet encapsulates a network layer 3 packet.

In contrast, a tunneling protocol encapsulates a packet of the same or lower layer. For example, generic routing encapsulation (GRE) can contain a layer 3 IPX packet within a layer 3 IP packet. A virtual private LAN service (VPLS) encapsulates a layer 2 Ethernet frame within a layer 3 IP packet. See IP tunneling, L2TP, SSTP, GRE and VPLS.
References in periodicals archive ?
9 billion hydraulic wastewater network tunnel currently being constructed by the Abu Dhabi Sewerage Services Company.
0 provides access through a highly available, secure encrypted network tunnel between a users device and the desired application
264/2006 on safety for tunnels in the trans-European road network tunnel "Serralunga" between km 41 +000 and km 42 +100 of the Salerno-Reggio Calabria, consisting of ordinary and extraordinary maintenance for 3 years.
Contract award: maintenance and troubleshooting network tunnel fire gometz-la-ville.
Client-integrity scanning to protect the network from compromise by unmanaged devices -- Remediation mechanisms to automatically quarantine non-compliant devices into areas where they can be brought into compliance with pre-defined policies -- Virtual desktops to create a secure encrypted environment on the endpoint where users can securely download confidential data -- Browser cache and file cleaning to ensure data downloaded to third-party and shared devices is completely removed -- Malicious code scanning to protect against potential security breaches -- Connection control to prevent the dissemination of confidential information via a second network tunnel.
Contract notice: Maintenance and troubleshooting network tunnel fire gometz-la-ville.
As a complement to the network tunnel Riederwald to bridge the gap between the provisional end of the motorway at the Hessen-Center (AS Frankfurt-Bergen-Enkheim) and the BAB 661 eastern bypass Frankfurt.
As a complement to the network tunnel Riederwald to bridge the gap between the provisional end of the motorway at Hessen-Center (AS Frankfurt-Bergen-Enkheim) and the BAB 661 eastern bypass Frankfurt.
Contract notice: Treatment plan conventional network tunnels and metric gauge of adif.
Part of the network tunnels under the floor, bringing the curbside check-ins to merge with the rest.
All SAFE programs support Virtual Private Network Tunnels, a secure method of transmitting private data over public networks.
This contract is for the recruitment of a security officer tunnels, coordinator of prevention and safety measures for the operation of the TEN network tunnels on the national road network not conceded managed by the DIR Central East ( Talant tunnel, tunnel Mountains and covered trench Firminy).

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