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Setup guide

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Glossary
GL-11
Cisco 6400 Software Setup Guide
OL-1183-04
PTA PPP Termination Aggregation.
PVC
permanent virtual circuit or connection. Virtual circuit that is permanently established. PVCs save
bandwidth associated with circuit establishment and tear down in situations where certain virtual
circuits must exist all the time. In ATM terminology, called a permanent virtual connection. Compare
with SVC. See also virtual circuit (VC).
PVP permanent virtual path. Virtual path that consists of PVCs. See also PVC and virtual path.
Q
QoS quality of service. Measure of performance for a transmission system that reflects its transmission
quality and service availability.
R
RADIUS
Remote Authentication Dial-In User Service. Database for authenticating dial-in connections and for
tracking connection time.
RBE routed bridge encapsulation. The process by which a stub-bridged segment is terminated on a
point-to-point routed interface. Specifically, the router is routing on an IEEE 802.3 or Ethernet header
carried over a point-to-point protocol such as PPP, RFC 1483 ATM, or RFC 1490 Frame Relay.
RBOC regional Bell operating company. One of the regional phone companies that resulted from the breakup
of the old AT&T. The RBOCs are still primarily limited to providing local access, although this is
changing.
rcp
remote copy protocol. Protocol that allows users to copy files to and from a file system residing on a
remote host or server on the network. The rcp protocol uses TCP to ensure the reliable delivery of data.
RFC Request For Comments. Document series used as the primary means for communicating information
about the Internet. Some RFCs are designated by the IAB as Internet standards. Most RFCs document
protocol specifications such as Telnet and FTP, but some are humorous or historical. RFCs are
available online from numerous sources.
RISC reduced instruction set computing.
RMON
Remote Monitoring. MIB agent specification described in RFC 1271 that defines functions for the
remote monitoring of networked devices. The RMON specification provides numerous monitoring,
problem detection, and reporting capabilities.
ROMMON ROM monitor.