Updated: May 31, 2026
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1. A service provider recently changed from RFC 3270 Uniform mode to Pipe mode. Which three considerations about this change are true? (Choose three.)
A) The Pipe mode provides the isolation between the customer and provider DiffServ domains, while maintaining a simpler support model.
B) In Uniform mode, when the topmost EXP value is changed, the changed EXP value will propagate to the original IP precedence or DSCP.
C) The Short Pipe mode derives the outbound classification of the WRED and WFQ based on the DiffServ policy of the provider.
D) If the provider moved to a Short Pipe mode model, it would allow them to implement customer-specific QoS policy on the PE egress.
2. Refer to the exhibit.
A customer's policy profile was updated to increase the minimum bandwidth to 256 kb/s for mission critical data, but reports indicate that the policy now has an error. What change should be made to the policy to correct this error?
A) The priority command should have been used, not the bandwidth command.
B) Set the shape rate to a CIR that is higher than 256 kb/s.
C) Increase the maximum queue size to 128 to compensate for the mission critical data.
D) The bandwidth statement should read 256000.
E) Use the shape peak command instead of the shape average command.
3. Which statement about when you mix TCP and UDP traffic in the same class and overflow occurs is true?
A) The overflow is not a problem, because both TCP and UDP packets get randomly dropped and traffic will back out.
B) Mixing TCP and UDP in the same class is not supported.
C) TCP traffic is starved, because UDP never slows down when packets get dropped.
D) UDP traffic suffers more, because TCP guarantees delivery.
4. Which Cisco IOS XR command will help troubleshoot why a policy map fails to apply on an interface?
A) show policymgr qos trace all
B) clear qos counters
C) show service-policy interface tenGigE 0/0/0/0
D) show policy-map interface tenGigE 0/0/0/0
E) show qos interface tenGigE 0/0/0/0
5. Which two items can be obtained from the CISCO-NETFLOW-MIB? (Choose two.)
A) signal-to-noise ratio
B) CEF tables
C) buffer hits
D) protocol statistics
E) cache configuration
Solutions:
| Question # 1 Answer: A,B,D | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: A | Question # 5 Answer: D,E |
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