In computer networking, IntServ or integrated services 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.
The idea of IntServ is that every router in the system implements IntServ, and every application that requires some kind of guarantees 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.
Read more about Integrated Services: Flow Specs, RSVP, Problems
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