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

1. When the RFC 3270 Short Pipe mode is used, the PHB at the egress router is based on which of these?

A) The packet is re-evaluated, remarked, and the PHB is based on this new marking.
B) The MPLS VPN label EXP value.
C) The topmost MPLS label EXP value.
D) The Differentiated Services Field value in the IP packet header.

2. Which three components would you use to define and apply traffic classification? (Choose three.)

A) class map
B) route map
C) route policy
D) policy map
E) service policy

3. Which statement about when you mix TCP and UDP traffic in the same class and overflow occurs is true?

A) UDP traffic suffers more, because TCP guarantees delivery.
B) Mixing TCP and UDP in the same class is not supported.
C) TCP traffic is starved, because UDP never slows down when packets get dropped.
D) The overflow is not a problem, because both TCP and UDP packets get randomly dropped and traffic will back out.

4. Which two statements about IP SLA are correct? (Choose two.)

A) IP SLA uses NBAR to provide the reporting engine for statistics that it collects.
B) Cisco IOS IP SLA is Layer 2 transport independent.
C) IOS IP SLA uses active traffic monitoring which allows users to analyze service levels for IP applications.
D) IOS IP SLA is a traffic monitoring mechanism that gathers statistics about traffic based on packet headers and fields.
E) Cisco IOS IP SLA can be used to help detail billing information for each defined class of service.

5. Refer to the exhibit.

Some customers report that at peak times during the day their average throughput seems to be less than what they expect. While troubleshooting, you notice that data flows sometimes seem to be synchronized with a tendency to increase then drop off in a repeating manner. Which action would help to alleviate this situation?

A) Change your QoS model from DiffServ to IntServ for better QoS scalability.
B) Implement WRED to help prevent tail drops during periods of congestion.
C) Implement traffic shaping to smooth out the peaks and troughs.
D) Decrease the size of output queues in the network to allow the scheduler to allocate link bandwidth fairly.

Solutions: