Q–R

QoS. Quality of Service.

Specifying different levels of service and possibly different paths through the network based on a given level of service required by a packet or a flow of packets.

Quality of Service.

See [QoS. Quality of Service. Specifying different levels of service and possibly different paths through the network based on a given level of service required by a packet or a flow of packets.]

query.

Used by EIGRP to find alternate paths that have not been advertised due to split horizon or other network conditions.

redundancy.

Alternate (extra) equipment and links placed in a network to ensure that a single failure in the network doesn't isolate the entire network.

registered address

Address that is registered for a particular organization's use on the Internet.

reply.

An EIGRP router uses a reply to answer a query about a given destination.

ring.

A network design that uses a ring of routers connected by point-to-point links; also, a physical/data link layer network that uses a ring media.

Round Trip Timeout.

See [RTO. Round Trip Timeout. The amount of time EIGRP will wait before deciding to take further action when a packet isn't acknowledged.]

route dampening.

The capability of a routing protocol to refuse to advertise or use a route if it has changed state a number of times over a short period of time.

router reflector.

A BGP router that either advertises routes learned from iBGP neighbors to other iBGP neighbors or reflects them to other iBGP neighbors.

RTO. Round Trip Timeout.

The amount of time EIGRP will wait before deciding to take further action when a packet isn't acknowledged.