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In computer networking, integrated services or IntServ is an architecture that specifies the elements to guarantee quality of service (QoS) on networks. IntServ can for example be used to allow video and sound to reach the receiver without interruption.
IntServ specifies a fine-grained QoS system, which is often contrasted with DiffServ's coarse-grained control system.
Under IntServ, every router in the system implements IntServ, and every application that requires some kind of QoS guarantee has to make an individual reservation. Flow specs describe what the reservation is for, while RSVP is the underlying mechanism to signal it across the network.