QoS (Quality of Service) Quiz (Online)

In which byte of an IP packet can traffic be marked?

The CoS byte

The ToS byte

The DSCP byte

The QoS byte

Which of the following is not a QoS Model?

Loss

DiffServ

IntServ

Best Effort

Which one is not a QoS requirement for voice?

Bandwidth 80kbps per call minimum for all codecs

Loss less than 1 percent

Latency less that 150 ms

Jitter less than 30 ms

Do QoS policies apply to the sender & receiver of traffic?

No, QoS policies must be applied only on the receiver

None

No, QoS policies must be applied only on the sender

Yes, QoS policies need to be applied to both

Quality of Service can alleviate which problems?

Dropped voice calls during periods of high network utilisation

Link Instability

Interface buffer overruns

Insufficient Bandwidth

Which of the following is NOT used for Quality of Service?

802.1X

DSCP bits

MPLS EXP bits

802.1P

What happens if conflicting QoS policies are deployed to the same Router?

If multiple policies apply, the more specific QoS policy takes precedence

None

If multiple policies apply, no QoS policy will take precedence

If multiple policies apply, the first applied QoS policy takes precedence

Which of the following QOS functions are performed on the incoming interface?

Packet Scheduling

Packet Classification

Congestion Management

Buffer Management

What does traffic shaping do to reduce congestion in a network?

Queues without buffering packets

Buffers and queues packets

Buffers without queuing packets

Drops packets

10.

What is the variation in delay of packets called?

Reliability

Bandwidth

Delay