- Home
- Networking
- CCNA Routing and Switching 200-125
71.
Which statement is correct about shaping of traffic for QoS?
- A.Shaping holds packets in the queue over the configured bit rate to cause delay.
- B.Shaping drops packets over the configured bit rate to cause loss.
- C.Shaping holds packets in the queue over the configured bit rate to cause jitter.
- D.Shaping slows packets in the queue over the configured bit rate to adhere to the speed.
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Shaping monitors the bit rate of packets. If the bit rate is exceeded for a configured queue, then shaping holds packets over the configured bit rate, causing a delay. |
72.
Which method helps combat queue starvation for QoS queuing?
- A.LLQ
- B.Policing.
- C.CBWFQ
- D.FIFO
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| QoS queue starvation occurs when the Low Latency Queuing (LLQ) is givenpriority over the Class-Based Weighted Fair Queuing. Therefore, policing of the LLQ will help limit queue starvation and allow those queues an equal share of the total output bandwidth. |
73.
Which QoS queue has priority over all other queues in the scheduler?
- A.CBWFQ
- B.LLQ
- C.FIFO
- D.CIR
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Low Latency Queue (LLQ) overrides Class Based Weighted Fair Queuing (CBWFQ). CBWFQ uses a weighted round-robin scheduling of packets. LLQ has priority override when packets come in matching the classification for LLQ. |
74.
What is the recommended maximum delay VoIP traffic should not exceed?
- A.10 ms
- B.90 ms
- C.150 ms
- D.300 ms
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The maximum delay that VOIP traffic should not exceed is 150 ms. At 150 ms, you will have call disruption. |
75.
Which DSCP marking has the highest priority?
- A.DSCP AF 43
- B.DSCP EF 46
- C.DSCP AF 11
- D.DSCP AF 00
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| The standardized marking of DSCP EF, or Expedite Forwarding, is a decimal equivalent of 46. This marking has the highest priority and should be used for VoIP traffic and video. |
|
|
||||||||||||||||||||||||||||
