DiffServ – Differentiated Services
DiffServ is a QoS mechanism used within IP networks. In essence, routers are configured with a number of PHBs (Per Hop Behaviours), which dictate a particular forwarding treatment a packet should receive. In turn, packets are marked with a 6bit DSCP (DiffServ Code Point) which, when identified by the router during the routing process, will determine the PHB which must be applied to the packet.
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