This chapter covers the following exam topics:
4.0 Infrastructure Services
4.3 Describe Basic QoS concepts
4.3.b Device trust
4.3.f Congestion Management
Quality of Service (QoS) refers to tools that network devices can use to manage several related characteristics of what happens to a packet while it flows through a network. Specifically, these tools manage the bandwidth made available to that type of packet, the delay the packet experiences, the jitter (variation in delay) between successive packets in the same flow, and the percentage of packet loss for packets of each class. These tools balance ...