6.1.2 ISA Approach o Provision of Qos over IP o Sharing available capacity when congested ◆ Router mechanisms Routing Algorithms Select to minimize delay i Packet discard Causes TcP sender to back off and reduce load ◆ Enahnced by IsA 66 6.1.2 ISA Approach Provision of QoS over IP Sharing available capacity when congested Router mechanisms ◼ Routing Algorithms  Select to minimize delay ◼ Packet discard  Causes TCP sender to back off and reduce load Enahnced by ISA