Int-Serv components
Need a method for apps to communicate their QoS needs (e.g., RAPI or Winsock2 QoS API)
Need a way to communicate the application’s requirements to network elements along the path and to convey QoS management information between network elements and the application (e.g., RSVP or SNMP)
Need Service Definitions for defining services offered by the network
Need traffic Control mechanisms in the network elements (routers and subnetworks) to control the QoS delivered to individual flows