- Exam Code: 642-785
- Exam Name: Maintaining Cisco Service Provider Quality of Service (MSPQS)
- Updated: Sep 11, 2026
- Q & A: 91 Questions and Answers
Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) : 642-785
PDF Version DemoAbout Cisco 642-785 Exam
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Cisco 642-785 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Monitoring and Troubleshooting QoS | 20% | - Analyzing queuing and congestion problems - Verifying QoS policies on IOS and IOS XR - Troubleshooting classification and marking issues |
| Topic 2: Queuing and Scheduling Mechanisms | 25% | - Class-Based Weighted Fair Queuing (CBWFQ) - Low Latency Queuing (LLQ) - Modular QoS CLI (MQC) implementation |
| Topic 3: QoS Fundamentals in Service Provider Networks | 20% | - Classification and marking mechanisms - Quality of Service models and architectures - DiffServ, IntServ, and MPLS QoS integration |
| Topic 4: QoS in MPLS and Service Provider Environments | 15% | - SLAs and QoS policy maintenance - QoS for Layer 2 and Layer 3 VPN services - End-to-end QoS across MPLS networks |
| Topic 5: Traffic Policing and Shaping | 20% | - Policing concepts and configuration - Shaping mechanisms and operation - Congestion management and avoidance |
Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:
Question #1
Refer to the exhibit.
Which two statements are correct? (Choose two.)
- A. No traffic can be matched to the VoIP traffic class.
- B. No traffic can be matched to the REALTIME traffic class.
- C. No traffic can be matched to the BULK-DATA traffic class.
- D. AF11 or AF12 or AF13 marked packets will be matched to the BULK-DATA traffic class.
- E. The BULK-DATA traffic class is missing the match-any option in the class-map command.
Correct Answer: B,D 🗳️
Question #2
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. provides congestion management by queueing the traffic using CBWFQ
- B. provides congestion avoidance by selectively delaying the delivery of packets with lower DSCP priority
- C. decreases congestion by avoiding global UDP synchronization
- D. provides congestion management by queueing the traffic using LLQ
- E. decreases the probability of congestion by selectively dropping TCP packets before the queue is full
Correct Answer: E 🗳️
Question #3
Which two methods can be used to monitor QoS performance? (Choose two.)
- A. NetFlow
- B. SNMP
- C. RMON
- D. TFTP
- E. SYSLOG
Correct Answer: A,B 🗳️
Question #4
Refer to the exhibit.
Which statement is correct?
- A. This example is a dual-rate policer, and traffic exceeding either the peak or the committed rate will be dropped.
- B. This example is a percentage-based policer, and the configured percentage is referenced to the input or output queue size.
- C. This example is a traffic policer, and traffic exceeding the committed rate will be buffered until the congestion is cleared.
- D. This example is a dual-bucket policer, and only traffic that exceeds the committed rate will be dropped.
- E. This example is a traffic policer, and three token buckets are used to meter the incoming traffic.
Correct Answer: A 🗳️
Question #5
Which two tools can be used to monitor and report on if a QoS queue is working on a network device? (Choose two.)
- A. CiscoWorks IPM
- B. IP SLA
- C. Splunk
- D. InfoVista
- E. NetCool
- F. Remedy
Correct Answer: A,D 🗳️
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