Day 6. QoS

CCNA 200-301 Exam Topics

  • Explain the forwarding per-hop behavior (PHB) for QoS such as classification, marking, queuing, congestion, policing, shaping

Key Topics

Today, we review quality of service (QoS), which refers to the tools and techniques network administrators can use to prioritize traffic on a network.

QoS

Normal default operation for switches and routers is to process frames and packets in the order in which they are received. This first-in, first-out (FIFO) queueing mechanism does not discriminate between traffic types.

QoS tools are used to classify traffic types based on the following four characteristics:

  • Latency (delay): Latency, or delay, is the amount of time it takes for data to be sent to the receiver. QoS ...

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