CCNA Cisco Certified Network Associate Study Guide - FTP Server

700 Glossary
PVP tunneling permanent virtual path tunneling: A technique that links
two private ATM networks across a public network using a virtual path;
wherein the public network transparently trunks the complete collection of
virtual channels in the virtual path between the two private networks.
QoS Quality of Service: A set of metrics used to measure the quality of
transmission and service availability of any given transmission system.
queue Broadly, any list of elements arranged in an orderly fashion and
ready for processing, such as a line of people waiting to enter a movie theater.
In routing, it refers to a backlog of information packets waiting in line
to be transmitted over a router interface.
R reference point Used with ISDN networks to identify the connection
between an NT1 and an S/T device. The S/T device converts the 4-wire network
to the two-wire ISDN standard network.
RAM random access memory: Used by all computers to store information.
Cisco routers use RAM to store packet buffers and routing tables, along with
the hardware addresses cache.
RARP Reverse Address Resolution Protocol: The protocol within the TCP/
IP stack that maps MAC addresses to IP addresses. See also: ARP.
rate queue A value, assigned to one or more virtual circuits, that specifies
the speed at which an individual virtual circuit will transmit data to the
remote end. Every rate queue identifies a segment of the total bandwidth
available on an ATM link. The sum of all rate queues should not exceed the
total available bandwidth.
RCP Remote Copy Protocol: A protocol for copying files to or from a file
system that resides on a remote server on a network, using TCP to guarantee
reliable data delivery.
redistribution Command used in Cisco routers to inject the paths found
from one type of routing protocol into another type of routing protocol. For
example, networks found by RIP can be inserted into an IGRP network.
redundancy In internetworking, the duplication of connections, devices,
or services that can be used as a backup in the event that the primary connections,
devices, or services fail.