QoS - DiffServ

Terminology;

• Behaviour Aggregate (BA): A collection of packets with the same DSCP crossing a link in a particular direction
• Differantiated Services Code Points (DSCP): A value in the IP header used to select a QoS treatment for a packet
• Per-hop behaviour (PHB): The externally observable forwarding behaviour (QoS traetment) applied at a DiffServ-compliant node to a DiffServ BA