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最新的 CCIP 642-642 免費考試真題:

1. When LLQ is being configured, which IOS command is used to limit the traffic rate on the priority queue even when the other class queues are not congested?

A) hold-queue
B) police
C) bandwidth
D) queue-limit
E) priority

2. Based on the configuration, which two of the following statements are true? (Choose two.)
policy-map police 1
class bulk-ftp
police cir percent 20 pir percent 40
conform-action set-dscp-transmit af11
exceed-action set-dscp-transmit 0
violate-action drop

A) This configuration will drop all exceeding traffic.
B) This is a multi-action, class-based policing example.
C) This is a dual-rate, class-based policing example.
D) This configuration will use a single token bucket.
E) This is a percentage-based policing example.

3. A major media company recently deployed a new converged network. The original network design used separate networks for graphics and video, interactive data, and voice. The company has been experiencing problems with voice traffic in the new converged network. Most of the time voice quality is perfectly acceptable. Periodically voice quality exhibits unacceptable choppy voice signals, and occasionally calls are dropped. At this time the company is not willing to simply add bandwidth to the network.
Which QoS solution would most likely help to resolve the problem?

A) Prioritize voice traffic as the highest priority to ensure that voice traffic is always serviced by the priority queue.
B) Use class-based weighted fair queuing to prioritize voice traffic with a higher weight than all other traffic.
C) Use TCP header compression and LFI to reduce delays.
D) Use advanced technologies to compress all video and graphics traffic on the network.

4. Refer to the exhibit. Why would applying the limit-interactive policy-map to the fa0/0 interface as shown below cause an error?
interface fa0/0 service-policy input limit-interactive

A) There is already an output service-policy defined on the fa0/0 interface.
B) The interactive traffic class is missing the bandwidth {kbps} command.
C) The interactive class-map has not been configured.
D) TCP header compression can only be applied in the output direction.
E) Class-based policing can only be applied in the output direction.

5. Traffic classification using NBAR is configured using which IOS command?

A) router(config-cmap)# match protocol {protocol-name}
B) router(config)# ip nbar pdlm {pdlm-file}
C) router(config)# ip nbar port-map {protocol} [tcp|udp] {port-number} {port-number} ....
D) router(config-if)# ip nbar protocol-discovery

問題與答案：