QoS (Quality of Service) Quiz (Online)

Quality of Service can alleviate which problems?

Dropped voice calls during periods of high network utilisation

Insufficient Bandwidth

Link Instability

Interface buffer overruns

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

Whether or not the service provider is using an MPLS core

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

Which option is the main function of congestion management?

Discarding excess traffic

Providing long-term storage of buffered data

Classifying traffic

Queuing traffic based on priority

Which of the following is not a QoS Model?

IntServ

DiffServ

Best Effort

Loss

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

The DSCP byte

The CoS byte

The QoS byte

The ToS byte

How does DiffServ deliver QoS across the network?

When using DiffServ, the network tries to deliver a particular kind of service that is based on the QoS that is specified by each packet

DiffServ delivers a particular kind of service based on either a flow-based behavior or a per-hop behavior, depending on how the traffic was marked and classified at ingress

DiffServ classifies and marks traffic at each node in the network

DiffServ tries to deliver a particular level of service on a per-flow basis across the network

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

802.1X

MPLS EXP bits

802.1P

DSCP bits

Which feature can you implement to reserve bandwidth for VoIP calls across the call path?

CBWFQ

Round robin

RSVP

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

Yes, QoS policies need to be applied to both

None

No, QoS policies must be applied only on the sender

No, QoS policies must be applied only on the receiver

10.

Which 8-bit field exists in IP packet for QoS?

Cos E

ToS

DSCP

IP Precedence