QoS (Quality of Service) Quiz (Online)

Which of the following is a Congestion Management Techniques?

Jitter

IP Precedence

First-in First-out

TOS Byte

Quality of Service can alleviate which problems?

Link Instability

Insufficient Bandwidth

Dropped voice calls during periods of high network utilisation

Interface buffer overruns

Which of the following is not a QoS Model?

Loss

DiffServ

IntServ

Best Effort

How does DiffServ deliver QoS across 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

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

Which one is not a QoS requirement for voice?

Jitter less than 30 ms

Loss less than 1 percent

Bandwidth 80kbps per call minimum for all codecs

Latency less that 150 ms

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

RED

Token Bucket

Predictor or stacker

FIFO metering

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

None

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

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

If multiple policies apply, no QoS policy will take precedence

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

Buffer Management

Congestion Management

Packet Scheduling

Packet Classification

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

Traffic Control

Traffic Shaping

Traffic Flow

Traffic Congestion

10.

Which of the following are examples of metrics for QoS?

Latency, WRED, Attenuation

SNR, Delay, WRED

AIS, Latency, NEXT

Jitter, Delay, Packet-loss