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Dial Plan

A collection of features and routing instructions associated with a route plan.  Users select the appropriate dial plan from a given route plan by entering the appropriate digits.  The system then routes the caller to the appropriate termination.

Diverse Circuit

A diverse circuit connects the same two endpoints in an Ethernet Private Line asanother circuit, but travels a different path over the provider's network.  Diversecircuits provide a backup to a working circuit.

DLCI

Data Link Control Identifier - This value offers an additional level of identification to direct a frame of information at End A or End Z ports to move down either one PVC or another.

DMZ

DeMilitarized Zone

DNS

Domain Name Service - A service developed to facilitate the use of Internet applications such as Web browsing, email, and other programs by assigning easily remembered names to IP addresses.

domain

In a Fully Qualified Domain Name, the domain is the part of the name following the third dot.  For example, in the Fully Qualified Domain Name \"www.qwest.com\", the domain is \"com\".

Domain Name

The \"plain English\" version of an IP address - Domain names allow users to remember Internet addresses more easily.  Domain names are resolved to their corresponding IP address by special servers called Domain Name Service, or DNS, servers.



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