Q−R - Cisco RJ-45-to-AUX Brochure

customers, which remains analog.
Q−R
Quality of Service (QoS)
A guarantee of a particular level of service for a connection. QoS uses queuing and other methods to
guarantee that bandwidth is available for a certain protocol, application, or address. QoS is important
for implementing applications such as voice and video.
queuing
Uses buffering and priority control mechanisms to control data congestion on the network. Another
term for QoS.
read/writes
The counting of packets on the ingress (read) as well as the egress (write) from the switching fabric.
Remote Monitoring (RMON)
An IETF standard that defines how devices gather and share network monitoring information. This
information can be used to send information gathered to an SNMP management station. RMON
gathers Layer 2 information concerning bandwidth use, collisions, and errors. Catalyst switches can
gather four of the nine different information types: Statistics, History, Alarm, and Event. The other
five groups can be monitored using a SPAN port and an attached protocol analyzer or probe.
remote node
A node or computer that is connected to the network through a dial−up connection. Dialing in to the
Internet from home is a perfect example of the remote node concept.
remote services
Services where the device supplying the services resides on a separate subnet from the device
requesting the services.
repeater
A device that regenerates and retransmits the signal on a network. A repeater is generally used to
strengthen signals going long distances.
Request For Comments (RFC)
Method used to post documents regarding networking or Internet−related standards or ideas. Some
have been adopted and accepted by the Internet Architecture Board as standards.
resource node
An interface on the network that provides a service for a demand node. Resource nodes can be such
items as servers, printers, and other devices available to connect to a network to provide services.
rights
Authorization provided to users, allowing them to perform certain tasks. Network administrators
generally assign rights. Slightly different from but often used with permissions.
ring in (RI)
A connector used in an IBM Token−Ring network on a Multistation Access Unit (MAU) to expand to
other MAUs on the network. Counterpart to the ring out (RO), the RI connector on the MAU connects
to the media to accept the token from the ring.
ring out (RO)
A connector used in an IBM Token−Ring network on a Multistation Access Unit (MAU) to expand to
other MAUs on the network. Counterpart to the ring in (RI), the RO connector on the MAU connects
to the media to send the token out to the ring.
RJ−11 connector
Used with telephone systems; can have either four or six conductors. A red/green pair of wires is used
for voice and data; a black/white pair is used for low−voltage signals.
RJ−45 connector
An Ethernet cable connector used with twisted−pair cable, which can support eight conductors for
four pairs of wires.
Route Switch Feature Card (RSFC)
A Cisco router on a card running the Cisco IOS. This card allows the switch to disregard installing an
RSM or daughter cards, because they are built into the modules.
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