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 ...

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