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

  • Exam Code: 642-785
  • Exam Name: Maintaining Cisco Service Provider Quality of Service (MSPQS)
  • Updated: Sep 08, 2026   Q&As: 91 Questions and Answers

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Cisco 642-785 Exam Syllabus Topics:
SectionWeightObjectives
Topic 1: Traffic Policing and Shaping20%- Policing concepts and configuration
- Congestion management and avoidance
- Shaping mechanisms and operation
Topic 2: Queuing and Scheduling Mechanisms25%- Modular QoS CLI (MQC) implementation
- Class-Based Weighted Fair Queuing (CBWFQ)
- Low Latency Queuing (LLQ)
Topic 3: Monitoring and Troubleshooting QoS20%- Verifying QoS policies on IOS and IOS XR
- Analyzing queuing and congestion problems
- Troubleshooting classification and marking issues
Topic 4: QoS Fundamentals in Service Provider Networks20%- DiffServ, IntServ, and MPLS QoS integration
- Classification and marking mechanisms
- Quality of Service models and architectures
Topic 5: QoS in MPLS and Service Provider Environments15%- QoS for Layer 2 and Layer 3 VPN services
- SLAs and QoS policy maintenance
- End-to-end QoS across MPLS networks
Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:
Question #1

DRAG DROP
Drag the definitions from the left onto the traffic classification on the right. Not all definitions will be used.

Answer:

Question #2

Which Cisco IOS feature is used to enable the following class map configuration?
class-map match-all test-cm
match protocol gnutella file-transfer "*"

  • A. Flexible Packets Matching
  • B. NBAR
  • C. CBWFQ
  • D. CAR
  • E. NetFlow
Answer: B
Question #3

What would be the first step when defining an MQC?

  • A. Attach the traffic policy (policy map) to the interface by using the service-policy command.
  • B. Define a traffic class by using the class-map command.
  • C. Apply the commands such as bandwidth, police, and set dscp to enable the QoS feature.
  • D. Create a traffic policy by using the policy-map command.
  • E. Add one or more match commands to classify packets.
Answer: B
Question #4

What are the benefits of using differentiated services in the service provider backbone? (Choose two.)

  • A. less bandwidth required to achieve the same SLA
  • B. simple, easy to design, deploy, and operate
  • C. more aggregate traffic supported
  • D. overprovision by two times the maximum aggregate
Answer: A,C
Question #5

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.
Answer: D

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