Lucent Technologies PortMaster - Manual (Page 319)

Glossary
Glossary-9
DCE
Data communications equipment. Devices and connections of a communications
network that make up the network end of the interface between the network and the
user. The DCE provides a physical connection to the network, forwards traffic, and
provides a clocking signal to synchronize data transmission between DCE and DTE
devices. Modems and interface cards are DCEs.
DDE
Dynamic data exchange. A form of interprocess communication that uses shared memory
to exchange data between applications. Applications can use a one-time data transfer or
ongoing exchanges.
degree of preference
In BGP, an arbitrary rating number that the PortMaster assigns to every route it receives
from a BGP peer. A higher numbers indicates a greater preference for a route when more
than one exists to a destination. A route from an internal peer is assigned the local
preference number that the PortMaster learned with the route. For a route learned from
an external peer, the PortMaster calculates a number based on the autonomous system
path length; the shortest path is preferred. You can use a routing policy rule to override
the calculated or learned value and assign your own degree of preference to a route. See
also local preference.
destination
In BGP, the final autonomous system in the autonomous system path whose IP address
prefixes and associated netmasks are reported in the network layer reachability
information (NLRI) field of an update message. A destination and its path comprise a BGP
route. See also path; route.
DHCP
Dynamic Host Configuratin Protocol. The underlying protocol for a network
administration software tool that enables network managers to set up servers to
automatically supply IP addresses and configuration settings to clients. DHCP extends and
enhances the BOOTP protocol by providing reusable IP addresses and allocating IP
addresses based on subnet, client ID string, or media access control (MAC) address.
dialback
See callback.
dial group
A number that is used to associate dial-out locations with ports.