CCNA 4 v6.0 (Connecting Networks v6) Chapter 6: Quality of Service: Check Your Understanding Questions Answers
1. Under which condition does congestion occur on a converged network with voice, video, and data traffic?
- If a user downloads a file that exceeds the file limitation that is set on the server
- If the request for bandwidth exceeds the amount of bandwidth available
- If video traffic requests more bandwidth than voice traffic requests
- If voice traffic latency begins to decrease across the network
2. What functionality is required on routers to provide remote workers with VoIP and video-conferencing capabilities?
3. What happens when a router interface ingress queue is full and new network traffic is received?
- The router sends the received traffic immediately.
- The router will drop the arriving packets.
- The router drops all traffic in the queue.
- The router queues the received traffic while sending previously received traffic.
4. Which queuing method provides user-defined traffic classes where each traffic class has a FIFO queue?
5. Which type of traffic does Cisco recommend be placed in the strict priority queue (PQ) when low latency queuing (LLQ) is being used?
6. What is the default queuing method used on the LAN interfaces of Cisco devices?
7. What is the default queuing method used on the slower WAN interfaces of Cisco devices?
8. Which model is the only QoS model with no mechanism to classify packets?
- Best effort
- Hard QoS
9. What happens when an edge router using IntServ QoS determines that the data pathway cannot support the level of QoS requested?
- Data is forwarded along the pathway using a best-effort approach.
- Data is forwarded along the pathway using DiffServ.
- Data is not forwarded along the pathway.
- Data is forwarded along the pathway using IntServ but not provided preferential treatment.
10. Which statement describes the QoS classification and marking tools?
- Classification is performed after traffic is marked.
- Classification should be done as close to the destination device as possible.
- Marking is the adding of a value to a packet header.
- Marking is the identification of which QoS policy should be applied to specific packets.
11. Which device would be classified as a trusted endpoint?
- IP conferencing station
12. How many bits are used to identify the class of service (CoS) marking in a frame?
13. How many levels of priority are possible when using class of service (CoS) marking on frames?