Explain the four steps used to implement QoS.

What will be an ideal response?


? Classification And Policing: When a packet arrives, a router classifies the packet by assigning
the packet a flow identifier. Once an identifier has been assigned, the router performspolicing, which means that the router verifies that the packet does not violate parameters for
the flow.
? Forwarding Computation: When computing a next-hop, a router or switch can use the flow
identifier.
? Output Queuing: Most implementations of QoS create a set of queues for each output port.
? Traffic Scheduling: A traffic scheduler implements the QoS policies by selecting a packet to
send whenever a port is idle.

Computer Science & Information Technology

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