10.1 IP telephony10.1.1 Voice VLANs10.1.2 Power over Ethernet10.2 QoS concepts10.2.1 Bandwidth10.2.2 Delay, jitter, and loss10.2.3 What QoS does10.3 Classification and marking10.3.1 Classification10.3.2 Marking10.3.3 Marking the DSCP field10.3.4 Trust boundaries10.4 Queuing and scheduling10.4.1 Priority Queuing10.4.2 Class-Based Weighted Fair Queuing10.4.3 Low Latency Queuing10.5 Policing and shaping10.6 Congestion avoidance10.6.1 Tail drop and TCP global synchronization10.6.2 Random Early Detection and Weighted Random Early DetectionSummary