Cisco,642-642,必威体育精装版题库.doc

CCIP Quality of Service (QoS) Number: 642-642 QUESTION 1 Based on the following 2950 switch configurations, which statement is correct? no wrr-queue cos-map wrr-queue bandwidth 20 10 70 1 wrr-queue cos-map 4 5 wrr-queue cos-map 1 0 1 2 3 wrr-queue cos-map 3 6 7 A. Queue 1 is setup as the expedite queue. B. Queue 2 is setup as the expedite queue. C. Queue 3 is setup as the expedite queue. D. Queue 4 is setup as the expedite queue. E. No queue is setup as the expedite queue. Answer: E Section: (none) Explanation/Reference: Explanation: To allocate bandwidth between standard transmit queue 1 (low priority) and standard transmit queue 2 (high priority), use the wrr-queue bandwidth command. Use the no form of this command to return to the default settings. wrr-queue bandwidth weight-1 weight-2 [ weight-3 ] no wrr-queue bandwidth QUESTION 2 Refer to the exhibit. Which three statements are true about the configuration? (Choose three.) class-map class-1 match ip rtp 2024 1000 class-map class 2 match dscp 5 6 7 policy-map access-group-1-traffic class class-1 shape peak 16000 class class-2 police 8000 1000 conform-action set-dscp-transmit 1 exceed-action set-dscp-transmit 0 violate-action drop class class-default fair-queue 16 queue-limit 20 interface fastethernet 0/0 service-policy output access-group1-traffic A. Traffic that is subject to shaping can burst up to 32,000 bps. B. IP traffic (DSCPs 5, 6, and 7) that is sent on fastethernet 0/0 will be traffic policed. C. RTP traffic (ports 2024 and 1000) that is sent on fastethernet 0/0 will be traffic shaped. D. Traffic that is subject to policing will have the DCSP set to 0 if the rate exceeds 1000 bps. E. IP traffic (DSCPs 1, 2, 3, and 4) that is sent on fastethernet 0/0 are considered to have a violate status and are dropped. F. IP traffic (DSCP 0) that is sent on fastethernet 0/0 will be subject to fair queuing. Answer: ABF Section: (none) Explanation/Referenc