QoS (Quality of Service) Quiz (Online)

Which type of technique is First-in-Last-out?

Traffic Congestion

Traffic Shaping

Traffic Flow

Traffic Control

Which statement about QoS default behaviour is true?

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

Packets are classified internally with an environment

Ports are untrusted by default

VoIP traffic is passed without being tagged

Which of the following is not a QoS Model?

Loss

DiffServ

IntServ

Best Effort

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

RED

FIFO metering

Token Bucket

Predictor or stacker

Which option describes the purpose of traffic policing?

It remarks traffic that is below the CIR

It prioritizes routing protocol traffic

It queues and then transmits traffic that exceeds the CIR

It drops traffic that exceeds the CIR

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 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

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

What is the variation in delay of packets called?

Delay

Bandwidth

Reliability

Delay

Which QoS model is the most widely used one today?

Best-Effort

DiffServ

None of these

IntServ

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

Buffer Management

Congestion Management

Packet Classification

Packet Scheduling

10.

Which one is not a QoS requirement for voice?

Jitter less than 30 ms

Bandwidth 80kbps per call minimum for all codecs

Loss less than 1 percent

Latency less that 150 ms