Glossary
packet
A message containing both control information and data. The control information is used for routing the packet through a network to its final destination. Contrast with frame relay frame.
packet-switching network
A telecommunications network based on
parameter
A numerical code that controls an aspect of terminal and/or network operation. Parameters control such aspects as page size, data transmission speed, and timing options.
permanent virtual circuit (PVC)
A frame relay logical link, whose endpoints and class of service are defined by network management. Analogous to an X.25 permanent virtual circuit, a PVC consists of the originating frame relay network element address, originating data link control identifier, terminating frame relay network element address, and termination data link control identifier. Originating refers to the access interface form which the PVC is initiated. Terminating refers to the access interface at which the PVC stops. Many data network customers require a PVC between two points. Data terminating equipment with a need form continuous communion use PVCs. See also data link connection identifier (DLCI).
ping
An internet protocol standard that provides loopback on demand for any device in an IP network. One device "pings" another by sending a loopback request to the device's IP address.
point-to-point
Type of communications link that connects a single device to another single device, such as a remote terminal to a host computer.
RDL
Remote digital loopback.
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