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Updated: Sep 07, 2026
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Cisco 642-785 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Maintaining Cisco Service Provider Quality of Service (MSPQS) |
| Exam Number: | 642-785 |
| Available Languages: | Japanese, English |
| Real Exam Qty: | 55-75 |
| Exam Format: | Drag and Drop, Multiple Choice Single Answer, Simulation, Multiple Choice Multiple Answer, Testlet, Simlet |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Related Certifications: | CCIP CCNP Service Provider |
| Exam Price: | USD 200-300 |
| Passing Score: | Not published by Cisco |
| Recommended Training: | Maintaining Cisco Service Provider Quality of Service (MSPQS) Course |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Cisco 642-785 Sample Questions |
| Exam Way: | Proctored at Pearson VUE test centers; retired exam no longer available |
| Pre Condition: | Recommended: CCNA Service Provider, CCIP, or equivalent knowledge and hands-on experience in service provider networking |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/retired.html |
Cisco 642-785 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Traffic Policing and Shaping | 20% | - Policing concepts and configuration - Shaping mechanisms and operation - Congestion management and avoidance |
| Queuing and Scheduling Mechanisms | 25% | - Low Latency Queuing (LLQ) - Modular QoS CLI (MQC) implementation - Class-Based Weighted Fair Queuing (CBWFQ) |
| Monitoring and Troubleshooting QoS | 20% | - Verifying QoS policies on IOS and IOS XR - Analyzing queuing and congestion problems - Troubleshooting classification and marking issues |
| QoS in MPLS and Service Provider Environments | 15% | - End-to-end QoS across MPLS networks - SLAs and QoS policy maintenance - QoS for Layer 2 and Layer 3 VPN services |
| QoS Fundamentals in Service Provider Networks | 20% | - Quality of Service models and architectures - Classification and marking mechanisms - DiffServ, IntServ, and MPLS QoS integration |
Cisco Maintaining Cisco Service Provider Quality of Service (MSPQS) Sample Questions:
Question 1
Which command shows real traffic statistics on each class map on the 10 Gigabit interface 0/10/0/0 at the egress direction?
A. show policy-map interface tenGigE 0/10/0/0 egress
B. show qos interface tenGigE 0/10/0/0 egress
C. show policy-map interface tenGigE 0/10/0/0 output
D. show service-policy interface tenGigE 0/10/0/0 output
E. show service-policy interface tenGigE 0/10/0/0 egress
F. show qos interface tenGigE 0/10/0/0 output
Question 2
To classify and prioritize traffic according to importance, which three statements are correct? (Choose three.)
A. Voice traffic should be given top priority.
B. Video should be placed in the same class as voice.
C. Critical applications should be given sufficient bandwidth to meet their requirements.
D. Each class should be guaranteed at least some bandwidth.
E. Email should be placed in a best-effort class.
Question 3
Refer to the exhibit.
Which two statements are correct? (Choose two.)
A. Within the cust2-classes policy, the gold class is guaranteed 30 percent of the S3/2 interface bandwidth. Silver is guaranteed 15 percent of the S3/2 interface bandwidth. Bronze is guaranteed 10 percent of the S3/2 interface bandwidth.
B. The traffic class cust2 is ensured a bandwidth of 51.2 kb/s.
C. This example queues the traffic into different CBWFQ classes before the aggregate traffic is shaped.
D. Within the cust1-classes policy, the gold class is guaranteed 50 percent of the bandwidth. Silver is guaranteed 20 percent of the bandwidth, and bronze is guaranteed 15 percent of the bandwidth.
E. The policy map cust-policy specifies an average traffic shaping rate of 384 kb/s for the cust1 class and assigns the service policy cust1-classes to the cust1 class.
F. This example is a hierarchical MQC example, and the cust-policy is the child policy.
Question 4
Refer to the exhibit.
Which queueing method has been configured?
A. MDRR
B. WFQ
C. CBWFQ
D. LLQ
E. priority queueing
Question 5
What problem could occur when applying this policy map on CE?
policy-map CE-SP-MODEL class VOIP priority class BROADCAST-VIDEO priority class SP-CRITICAL-DATA bandwidth percent 40 random-detect exp 3 15000 packets 45000 packets class class-default random-detect exp 1 2500 packets 7500 packets random-detect exp 0 1500 packets 10500 packets
A. Only one priority queue is allowed per policy.
B. No bandwidth or policing is configured for voice and video traffic, and other traffic could be impacted.
C. Default class does not have bandwidth assigned.
D. All traffic is classified and treated properly, no issues occur.
Solutions:
| Question 1 Answer: C | Question 2 Answer: A,C,E | Question 3 Answer: D,E | Question 4 Answer: C | Question 5 Answer: B |
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