Questions on Quality of Service (QoS)

What is Quality of Service (QoS)?

• A way to increase internet speed

• A method to control traffic and ensure the performance of critical applications

• A type of security firewall

• A protocol for data encryption

What is bandwidth?

• The speed of a network connection

• The amount of data transferred in a given time

• The range of frequencies used for wireless communication

• The number of devices in a network

Which factor does NOT affect bandwidth?

• Hardware limitations

• Interference

• Protocol overhead

• Operating system version

What is the difference between bandwidth and throughput?

• Bandwidth refers to maximum capacity, while throughput is actual data transmission

• Throughput measures network speed, while bandwidth measures latency

• Bandwidth is about security, while throughput is about storage

• There is no difference between bandwidth and throughput

What does network congestion cause?

• Increase in bandwidth

• Decrease in delays

• Increased queuing delays and packet loss

• Faster data transmission

What is propagation delay?

• The time taken for a data packet to be queued

• The time it takes for a packet to travel from source to destination

• The time required to process a packet before sending

• The time taken to retransmit lost packets

What does transmission delay depend on?

• Number of users in a network

• Packet size and bandwidth

• Operating system performance

• Type of network topology

Which of the following can cause network delays?

• Distance

• Network congestion

• Protocol overhead

• All of the above

What is queuing delay?

• The time a packet spends waiting in a queue before transmission

• The time it takes for data to be encrypted

• The time taken for a router to process a packet

• The time taken to retransmit a lost packet

What is packet loss?

• When a packet gets duplicated in the network

• When data packets fail to reach their destination

• When a packet is encrypted for security

• When a packet is delayed but eventually arrives