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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 - DiffServ, IntServ, and MPLS QoS integration - Quality of Service models and architectures |
| Topic 4: QoS in MPLS and Service Provider Environments | 15% | - End-to-end QoS across MPLS networks - QoS for Layer 2 and Layer 3 VPN services - SLAs and QoS policy maintenance |
| Topic 5: Traffic Policing and Shaping | 20% | - Policing concepts and configuration - Congestion management and avoidance - Shaping mechanisms and operation |
Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:
Question 1
Which three NetFlow versions are supported by Cisco NetFlow Analyzer? (Choose three.)
A. 5
B. 6
C. 9
D. 1
E. 7
F. 8
Question 2
An MPLS VPN customer reports that their DSCP markings from one CE to another CE are being remarked by the service provider. What can cause customer packets to be remarked?
A. The MPLS VPN service provider is using Penultimate Hop Popping.
B. The service provider is using the Short Pipe mode as the MPLS QoS tunnel mode.
C. The service provider is using Pipe mode as the MPLS QoS tunnel mode.
D. The service provider is using Uniform mode as the MPLS QoS tunnel mode.
Question 3
Refer to the exhibit.
Which two statements are correct? (Choose two.)
A. The voice class is configured with the police 128 command.
B. The voice class is configured with the bandwidth 128 command.
C. The voice class is configured with the priority 128 command.
D. The class-default class is configured with the fair-queue command.
E. The gold class is configured with the bandwidth 100 command.
F. The gold class is configured with the priority 100 command.
Question 4
Refer to the exhibit.
You have implemented RFC 3270 Pipe mode in your MPLS network. A customer packet with the DSCP value of AF31 has been sent to the ingress PE router. The PE router has set the MPLS experimental bits per policy, but the policer has remarked the experimental bits of the top label. What will the DSCP value of the packet be when it leaves the egress PE router?
A. CS1
B. CS4
C. BE
D. CS3
E. AF31
Question 5
When the RFC 3270 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 packet is re-evaluated, remarked, and the PHB is based on this new marking.
C. The MPLS VPN label EXP value.
D. The topmost MPLS label EXP value.
Solutions:
| Question 1 Answer: A,C,D | Question 2 Answer: D | Question 3 Answer: C,E | Question 4 Answer: E | Question 5 Answer: D |







