Q-R

Quality

In requirements analysis, refers to the user requirement for quality of the presentation to the user.

Quality of service

Also known as QoS; determining, setting, and acting on priority levels for traffic flows.

Rate-critical applications

Applications that require a predictable, bounded, or high degree of capacity.

Real-time analysis

Setting and monitoring of thresholds or boundaries for end-to-end, per-link, or per-element characteristics for short-term or immediate notification of events and transients.

Real-time applications

Applications that have a strict timing relationship between source and destination, with one or more timers set for the receipt of information at the destination.

Reference network architecture

A description of the complete architecture, considering all of its components. It is a compilation of the relationships developed during the network architecture process.

Reliability

(1) A statistical indicator of the frequency of failure of the network and its components and represents the unscheduled outages of service. (2) In requirements analysis, reliability is a user requirement for consistently available service.

Remote access

Network access based on traditional dial-in, point-to-point sessions, and virtual private network connections.

Requirements

Descriptions of network functions and performance that are needed for the network to successfully support its users, applications, and devices.

Requirements analysis

Gathering and deriving requirements in order to understand system and network behaviors.

Requirements map

A diagram that shows the location dependencies between applications and devices, which will be used for flow analysis.

Requirements specification

A document that lists and prioritizes the requirements gathered for your architecture and design.

Resource control

Mechanisms that will allocate, control, and manage network resources for traffic.

RIP and RIPv2

IGPs that are based on a distance-vector routing algorithm.

Route aggregation

The technique exchanging of routing information between ASs, usually between service providers with transit networks, and between large customer networks.

Route filter

A statement, configured in one or more routers, that identifies one or more IP parameters (e.g., an IP source or destination address) and an action (e.g., drop or forward) to be taken when traffic matches these parameters.

Route filtering

The technique of applying filters to hide networks from the rest of an AS or to add, delete, or modify routes in the routing table.

Routing

Learning about the connectivity within and between networks and applying this connectivity information to forward IP packets toward their destinations.

Routing boundaries

Physical or logical separations of a network based on requirements for or administration of that network.

Routing flows

Flows of routing information, passed between functional areas and between ASs.