CCNA Cisco Certified Network Associate Study Guide - FTP Server

Glossary 701
RJ connector registered jack connector: Is used with twisted-pair wiring
to connect the copper wire to network interface cards, switches, and hubs.
reload An event or command that causes Cisco routers to reboot.
RIF Routing Information Field: In source-route bridging, a header field that
defines the path direction of the frame or token. If the Route Information Indicator
(RII) bit is not set, the RIF is read from source to destination (left to
right). If the RII bit is set, the RIF is read from the destination back to the
source, so the RIF is read right to left. It is defined as part of the Token Ring
frame header for source-routed frames, which contains path information.
ring Two or more stations connected in a logical circular topology. In this
topology, which is the basis for Token Ring, FDDI, and CDDI, information
is transferred from station to station in sequence.
ring topology A network logical topology comprising a series of repeaters
that form one closed loop by connecting unidirectional transmission links.
Individual stations on the network are connected to the network at a
repeater. Physically, ring topologies are generally organized in a closed-loop
star. Compare with: bus topology and star topology.
RIP Routing Information Protocol: The most commonly used interior
gateway protocol in the Internet. RIP employs hop count as a routing metric.
See also: Enhanced IGRP, IGP, OSPF, and hop count.
ROM read-only memory: Chip used in computers to help boot the device.
Cisco routers use a ROM chip to load the bootstrap, which runs a power-on
self test, and then find and load the IOS in flash memory by default.
root bridge Used with the Spanning-Tree Protocol to stop network loops
from occurring. The root bridge is elected by having the lowest bridge ID.
The bridge ID is determined by the priority (32,768 by default on all bridges
and switches) and the main hardware address of the device. The root bridge
determines which of the neighboring layer-2 devices’ interfaces become the
designated and nondesignated ports.
routed protocol Routed protocols (such as IP and IPX) are used to
transmit user data through an internetwork. By contrast, routing protocols
(such as RIP, IGRP, and OSPF) are used to update routing tables between
routers.