Cisco 642-785

Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) 認定 642-785 試験問題:

1. Refer to the exhibit.

Which two statements are correct? (Choose two.)

A) The policy map cust-policy specifies an average traffic shaping rate of 384 kb/s for the cust1 class and assigns the service policy cust1-classes to the cust1 class.
B) Within the cust2-classes policy, the gold class is guaranteed 30 percent of the S3/2 interface bandwidth. Silver is guaranteed 15 percent of the S3/2 interface bandwidth. Bronze is guaranteed 10 percent of the S3/2 interface bandwidth.
C) This example queues the traffic into different CBWFQ classes before the aggregate traffic is shaped.
D) Within the cust1-classes policy, the gold class is guaranteed 50 percent of the bandwidth. Silver is guaranteed 20 percent of the bandwidth, and bronze is guaranteed 15 percent of the bandwidth.
E) The traffic class cust2 is ensured a bandwidth of 51.2 kb/s.
F) This example is a hierarchical MQC example, and the cust-policy is the child policy.

2. Which two methods can be used to monitor QoS performance? (Choose two.)

A) SYSLOG
B) RMON
C) SNMP
D) NetFlow
E) TFTP

3. Which three match statements are valid in Cisco IOS XR Software? (Choose three.)

A) match qos-group
B) match flow
C) match vpls
D) match mpls experimental topmost
E) match port-type
F) match field

4. Refer to the exhibit.

A provider uses the recommended mappings for DSCP to MPLS EXP. Several sites connected to the same PE router report that critical data has been experiencing a high number of drops. The customer marks its CRITICAL data as AF31. What appears to be the problem?

A) The allocated bandwidth for CRITICAL-DATA should be increased to provide sufficient bandwidth to support the application.
B) If the data receiving drops is high priority, it should be marked with MPLS EXP value 7.
C) The provider is using the recommended mappings for DSCP to MPLS EXP, so the CLASS-MAP for the CRITICAL-DATA should contain EXP value of 4.
D) The classification for CRITICAL-DATA should contain a match-all, not a match-any.
E) The recommended mapping for AF31 is to MPLS EXP 5, which is classified in the REALTIME class, not the CRITICAL DATA class.

5. Refer to the exhibit.

Your MPLS network is using RFC 3270 Uniform mode. Your customer reports that when a Microsoft NetMeeting call is placed between the workstations, the user at 172.16.1.2 experiences acceptable audio quality but the user at 172.16.2.2 experiences poor audio quality. What course of action should you take?

A) Have the customer set the correct marking of audio packets at the 172.16.2.2 device.
B) Use a policy map at the ingress to the PE2 router to remark packets from 172.16.2.2.
C) Have the customer set the correct marking of audio packets at the 172.16.1.2 device.
D) Change your policy to not remark audio packets within your network.
E) Use a policy map at the ingress to the PE1 router to remark packets from 172.16.1.2.

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