(2.1) Traffic Management Mechanism:- taa - Difrserv is a class-based mechanism for traffic management. - IntServ is a flow-based mechanism. - Differentiated Service operates on the principle of traffic classification, where each data packet is placed into a limited number of traffic classes, rather than differentiating network traffic based on the requirements of an individual flow. - Differentiated Service model does not make judgment on what types of traffic should be given priority treatment since that is left up to the network operator. - DiffServ relies on a mechanism to classify and mark packets as belonging to a specific class. - DiffServ routers implement Per-Hop Behaviors (PHBs), which define the packet forwarding properties associated with a class of traffic. (2.2) Classification and Markings:- ,u> blis, - Network traffic entering a DiffServ domain is subjected to classification and conditioning. - Traffics are classified by many different parameters, such as: 1. Source address. 2. Destination address. 3. Traffic typ. 4. Assigned to a specific traffic class