QoS (Quality of Service) Quiz (Online)

Which option is the main function of congestion management?

Discarding excess traffic

Providing long-term storage of buffered data

Queuing traffic based on priority

Classifying traffic

What is the variation in delay of packets called?

Reliability

Bandwidth

Delay

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

TRUE

FALSE

Which statement about QoS default behaviour is true?

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

VoIP traffic is passed without being tagged

Ports are untrusted by default

Packets are classified internally with an environment

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

The CoS byte

The QoS byte

The ToS byte

The DSCP byte

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

Cos E

ToS

IP Precedence

DSCP

How many bits are used for QoS in the MPLS Header?

How does DiffServ deliver QoS across the network?

DiffServ classifies and marks traffic at each node in the network

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 tries to deliver a particular level of service on a per-flow basis 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

Which of the following is not a QoS Model?

IntServ

Best Effort

Loss

DiffServ

10.

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

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

Whether or not the service provider is using an MPLS core

The SLAs offered by the service provider

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