QoS (Quality of Service) Quiz (Online)

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

FALSE

TRUE

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

Buffers and queues packets

Buffers without queuing packets

Drops packets

Queues without buffering packets

Which mathematical model is used by traffic policing mechanisms to meter traffic?

Token Bucket

Predictor or stacker

FIFO metering

RED

How does DiffServ deliver QoS across 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 classifies and marks traffic at each node in 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 tries to deliver a particular level of service on a per-flow basis across the network

What is the variation in delay of packets called?

Delay

Reliability

Delay

Bandwidth

Quality of Service can alleviate which problems?

Dropped voice calls during periods of high network utilisation

Interface buffer overruns

Link Instability

Insufficient Bandwidth

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

IP Precedence

ToS

DSCP

Cos E

Which option describes the purpose of traffic policing?

It remarks traffic that is below the CIR

It drops traffic that exceeds the CIR

It prioritizes routing protocol traffic

It queues and then transmits traffic that exceeds the CIR

Which QoS parameters are required to transfers credential file from one source to a destination?

Bandwidth and Data loss

Jitter

Best Effort

Latency

10.

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