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Metro Ethernet by Sam Halabi

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D
Data Packet Transport (DPT).

A Media Access Control protocol that adds resiliency and protection to packet networks deployed in a ring topology.

Decoupled Transparent LAN Service (DTLS).

A service that emulates a LAN over an IP/MPLS network, similar to VPLS. DTLS, however, proposes to remove any L2 switching from the provider edge devices and restrict the L2 switching to the customer edge devices.

detour LSP.

An LSP that is set up to reroute the traffic in case the main LSP fails.

Diffserv.

A method used to classify IP packets so that different classes receive different quality of service treatment when forwarded in the network.

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