Cisco Systems RJ-45-to-AUX manual 390

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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