Q

quad-wide

A type of PIC that combines the PIC and the FPC within a single FPC slot.

qualified next hop

A next hop for a static route that allows a second next hop for the same static route to have different metric and preference properties than the original.

quality of service (QoS)

Performance, such as transmission rates and error rates, of a communications channel or system.

querier router

PIM router on a broadcast subnet responsible for generating IGMP Query messages for the segment.