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

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

Temporary storage of excess packets

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

Buffer and delay egress traffic rates that momentarily peak

Storage + Scheduling

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

When congestion clears

When there is round robin in action

When an output interface is experiencing congestion

When there is no congestion at all

3. 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

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

When congestion clears

When there is round robin in action

When congestion is 100%

When an output interface is experiencing congestion

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

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

Temporary storage of excess packets

Queuing + Scheduling

Buffer and delay egress traffic rates that momentarily peak

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

PIR

CIR

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

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

Buffer and delay egress traffic rates that momentarily peak

Temporary storage of excess packets

Storage + Scheduling

8. Which of these best describes PQ 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

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

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

9. 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

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

10. Which of these best describes WFQ in QoS?

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

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

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

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

M	T	W	T	F	S	S
						1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30

Written by Arman Hasen