QoS (Quality of Service) Quiz for Cisco ENCOR/CCNP

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1. In Token Bucket, the tokens are added into the bucket at a fixed rate which is called:

CIR

PIR

2. Which one is correct description of Congestion Management in QoS?

Queuing + Scheduling

Drop or re-mark incoming or outgoing traffic that goes beyond a desired traffic rate

Temporary storage of excess packets

Buffer and delay egress traffic rates that momentarily peak

3. Which one is correct description of Shaping in QoS?

Buffer and delay egress traffic rates that momentarily peak

Storage + Scheduling

Temporary storage of excess packets

Drop or re-mark incoming or outgoing traffic that goes beyond a desired traffic rate

4. Which of these best describes WFQ in QoS?

Queues are serviced in sequence one after the other, and each queue processes one packet only

A set of four queues (high, medium, normal, and low) are served in strict-priority order

It automatically divides the interface BW by the number of flows to allocate bandwidth fairly among all flows

It involves a single queue where the first packet to be placed on the output interface queue is the first packet to leave the interface

5. Which of these best describes PQ in QoS?

Queues are serviced in sequence one after the other, and each queue processes one packet only

A set of four queues (high, medium, normal, and low) are served in strict-priority order

It involves a single queue where the first packet to be placed on the output interface queue is the first packet to leave the interface

It automatically divides the interface BW by the number of flows to allocate bandwidth fairly among all flows

6. Which one is correct description of Queuing (Buffering) in QoS?

Storage + Scheduling

Buffer and delay egress traffic rates that momentarily peak

Drop or re-mark incoming or outgoing traffic that goes beyond a desired traffic rate

Temporary storage of excess packets

7. When Queuing in QoS is considered as ‘De-activated’ ?

When an output interface is experiencing congestion

When congestion is 100%

When there is round robin in action

When congestion clears

8. Which of these best describes FIFO in QoS?

It involves a single queue where the first packet to be placed on the output interface queue is the first packet to leave the interface

It automatically divides the interface BW by the number of flows to allocate bandwidth fairly among all flows

A set of four queues (high, medium, normal, and low) are served in strict-priority order

Queues are serviced in sequence one after the other, and each queue processes one packet only

9. When Queuing in QoS is considered as ‘Activated’ ?

When there is no congestion at all

When an output interface is experiencing congestion

When there is round robin in action

When congestion clears

10. Which one is correct description of Policing in QoS?

Combination of queuing and scheduling

Temporary storage of excess packets

Buffer and delay egress traffic rates that momentarily peak

Drop or re-mark incoming or outgoing traffic that goes beyond a desired traffic rate