Network QoS Models PDF

1. What is the term used to indicate a variation of delay? jitter 2. A network engineer performs a ping test and receives a value that shows the time it takes for a packet to travel from a source to a destination device and return. Which term describes the value? latency 3. What role...

1. What is the term used to indicate a variation of delay? jitter 2. A network engineer performs a ping test and receives a value that shows the time it takes for a packet to travel from a source to a destination device and return. Which term describes the value? latency 3. What role do network devices play in the IntServ QoS model? Network devices ensure that resources are available before traffic is allowed to be sent by a host through the network. 4. Which device would be classified as a trusted endpoint? IP phone 5. Under which condition does congestion occur on a converged network with voice, video, and data traffic? if the request for bandwidth exceeds the amount of bandwidth available 6. Which type of traffic does Cisco recommend be placed in the strict priority queue (PQ) when low latency queuing (LLQ) is being used? voice 7. Which model is the only QoS model with no mechanism to classify packets? best-effort 8. What happens when the memory queue of a device fills up and new network traffic is received? The network device will drop the arriving packets. 9. What are two characteristics of voice traffic? (Choose two.) It consumes few network resources. It is delay sensitive. 1o. Which QoS model is very resource intensive and provides the highest guarantee of QoS?  IntServ 11. What happens when an edge router using IntServ QoS determines that the data pathway cannot support the level of QoS requested? Data is not forwarded along the pathway. 12. In QoS models, which type of traffic is commonly provided the most preferential treatment over all other application traffic? voice traffic 13. Which queuing mechanism supports user-defined traffic classes? CBWFQ 14. What mechanism compensates for jitter in an audio stream by buffering packets and then replaying them outbound in a steady stream? playout delay buffer