Quality of Service

What is the purpose of performance guarantees in a network system?

• To achieve high-throughput performance

• To provide quantifiable guarantees on certain metrics

• To ensure privacy on packet payloads

• To hide the complexities of one layer from the others

Where can security protocols be employed in the protocol stack?

• Only at the network layer

• Only at the transport layer

• At different layers in the protocol stack

• At the application layer

What is the purpose of quality of service (QoS) in a network?

• To provide reliable data transfer

• To improve the network's ability to support applications with specific requirements

• To achieve high throughput in a best-effort sense

• To ensure privacy on packet payloads

Which application has strict requirements on end-to-end packet delay and loss rate?

• Internet telephony

• Video conferencing

• Video streaming

• Reliable data transfer

What are the requirements for the audio stream in video conferencing?

• Low delay and high data rate

• Low delay and limited packet loss

• High data rate and limited packet loss

• High delay and limited packet loss

What is the main difference between video conferencing and video streaming?

• Video conferencing requires reliable data transfer

• Video streaming requires low delay

• Video conferencing requires audio and video to be displayed in sync

• Video streaming requires high data rate

What is the real-time constraint in video streaming?

• Buffering before playback starts

• Low delay and limited packet loss

• High data rate and limited packet loss

• Audio and video displayed in sync

What is the main purpose of reliable data transfer protocols in video streaming?

• To achieve high throughput

• To ensure privacy on packet payloads

• To provide continuous playback

• To hide the complexities of one layer from the others

What is the network requirement for video streaming?

• Low delay and high data rate

• Low delay and limited packet loss

• High data rate and limited packet loss

• High delay and limited packet loss

Which type of applications typically require quality of service (QoS)?

• Applications with real-time constraints

• Applications with reliable data transfer

• Applications with high throughput

• Applications with privacy requirements