QoS (Quality of Service) Quiz (Online)

In which service do we try to avoid traffic congestion?

Both congestion control and quality of service

Neither congestion control nor quality of service

Congestion control

Quality of service

The QoS requirements on the CE and PE router differ depending on which factor?

Whether or not the CE router is managed by the service provider

The SLAs offered by the service provider

Whether or not the PE router is managed by the service provider

Whether or not the service provider is using an MPLS core

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

The QoS byte

The DSCP byte

The CoS byte

The ToS byte

What is the variation in delay of packets called?

Delay

Bandwidth

Delay

Reliability

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

If multiple policies apply, no QoS policy will take precedence

None

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

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

Which option is the main function of congestion management?

Providing long-term storage of buffered data

Discarding excess traffic

Classifying traffic

Queuing traffic based on priority

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

802.1X

MPLS EXP bits

802.1P

DSCP bits

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

Buffers and queues packets

Queues without buffering packets

Buffers without queuing packets

Drops packets

Which statement about QoS default behaviour is true?

Packets that arrive with a tag are untagged at the edge of an administrative domain

Ports are untrusted by default

VoIP traffic is passed without being tagged

Packets are classified internally with an environment

10.

QoS is useful only if VOIP is used in the network:

TRUE

FALSE