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Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:

1. An MPLS VPN customer with managed CE services recently made some changes to their call manager configurations. Now the customer reports that their VoIP traffic voice quality is very poor. What could be a cause of the problem?

A) The VoIP traffic class is not being policed at the CE router egress.
B) The traffic shaping rate for the VoIP traffic class is too low.
C) RTP header compression is used for the VoIP traffic class.
D) The VoIP traffic is being marked as DSCP EF.
E) The customer changed the codec used for voice compression from G.729 to G.711.

2. Which two tools can be used to monitor and report on if a QoS queue is working on a network device? (Choose two.)

A) InfoVista
B) CiscoWorks IPM
C) Splunk
D) IP SLA
E) NetCool
F) Remedy

3. Which three items are important when monitoring service quality in the SP network? (Choose three.)

A) Troubleshooting class map configurations is complex and frequently required.
B) The typical cause of QoS issues is intermittent failure of network devices and these are inherently difficult to detect.
C) QoS issues can be difficult to detect when there is not enough traffic to trigger the configured QoS policy.
D) Establishing alarm thresholds for QoS problems can be complicated.
E) Collection of data to detect QoS issues is slow and labor-intensive.
F) QoS support differs from device to device, depending on underlying hardware platforms and software.

4. Within a QoS policy-map configuration, one of the traffic classes is configured with the random-detect dscp-based configuration command. What will that command accomplish?

A) decreases congestion by avoiding global UDP synchronization
B) decreases the probability of congestion by selectively dropping TCP packets before the queue is full
C) provides congestion management by queueing the traffic using CBWFQ
D) provides congestion management by queueing the traffic using LLQ
E) provides congestion avoidance by selectively delaying the delivery of packets with lower DSCP priority

5. What problem could occur when applying this policy map on CE?
policy-map CE-SP-MODEL class VOIP priority class BROADCAST-VIDEO priority class SP-CRITICAL-DATA bandwidth percent 40 random-detect exp 3 15000 packets 45000 packets class class-default random-detect exp 1 2500 packets 7500 packets random-detect exp 0 1500 packets 10500 packets

A) All traffic is classified and treated properly, no issues occur.
B) Only one priority queue is allowed per policy.
C) Default class does not have bandwidth assigned.
D) No bandwidth or policing is configured for voice and video traffic, and other traffic could be impacted.

Solutions: