Cisco 642-785 : Maintaining Cisco Service Provider Quality of Service (MSPQS)

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Cisco 642-785 Exam Syllabus Topics:

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

Question 1

What can be used to provide read-only access to QoS configuration information and statistics from a network management station?

A. CISCO-CLASS-BASED-QOS-MIB
B. NBAR
C. NetFlow
D. SYSLOG
E. IP SLA

Question 2

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

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

Question 3

You have deployed IP SLA in your network to monitor VoIP. You want to be notified on network delay before it affects voice quality. What threshold should be set?

A. 250 ms one-way
B. 200 ms round trip
C. 50 ms round trip
D. 150 ms round trip
E. 150 ms one-way

Question 4

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

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

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

Solutions: