quality of service: A set of metrics used to measure the quality of transmission and service availability of any given transmission system.
Broadly, any list of elements arranged in an orderly fashion and ready for processing, such as a line of people waiting to enter a movie theater. In routing, it refers to a backlog of information packets waiting in line to be transmitted over a router interface. Queuing disposition is the term applied to the order of packets in the queue.
A quality of service process that enables packets to be forwarded from the router based on administratively defined parameters. This can be used for time-sensitive protocols, such as SNA.