Free Cisco 642-785 Exam Dumps Questions & Answers

A customer with an unmanaged CE router has reported experiencing poor quality on the video conferencing and broadcast multimedia applications. To address the issue, the provider has implemented shaping on the PE router to "smooth out" speed mismatches in the network. Which of these is a valid concern with this approach?

• A.  In addition to shaping, the provider should implement policing so the application can detect the congestion and throttle traffic.
• B.  Shaping should only be used in a TCP-based environment where the application can detect the congestion and adjust. Shaping provides little benefit with UDP applications.
• C.  Shaping can only be applied to the outbound interface, which does not prevent the customer from flooding the inbound link to the provider.
• D.  While shaping may help the broadcast multimedia application, it could cause additional delay in the video conferencing application.

Refer to the exhibit.

Which two statements about the SP-REALTIME traffic class are true? (Choose two.)

• A.  Traffic is queued using LLQ.
• B.  Traffic is policed to 35 percent of the interface bandwidth.
• C.  Traffic conforming to the police rate will be transmitted and all the markings on the packets will be cleared.
• D.  The police configuration command is missing the violate-action option.
• E.  The priority configuration command is missing the maximum guaranteed bandwidth rate.

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 output
• B.  show qos interface tenGigE 0/10/0/0 egress
• C.  show policy-map interface tenGigE 0/10/0/0 egress
• D.  show qos interface tenGigE 0/10/0/0 output
• E.  show service-policy interface tenGigE 0/10/0/0 output
• F.  show service-policy interface tenGigE 0/10/0/0 egress

You work for service provider that employs a four-class service provider QoS model (best effort, bronze, silver, gold). A customer recently reported an issue with high drop rate on a mission-critical database application in the silver class. The silver class is currently at capacity. The gold class is currently only used for voice and video conferencing, and has available bandwidth. The application was remapped to the gold class. Which statements are valid alternative options to this decision? (Choose two.)

• A.  Moving to a three-class QoS model would allow for more bandwidth per class and would reduce the support of maintaining multiple classes.
• B.  In addition to the remapping, the provider would have to change the queue model from WFQ to priority queued.
• C.  Additional bandwidth should have been added to the silver class from one of the lower classes before the traffic class was moved.
• D.  The provider should consider moving to a six-class QoS model to provide more available classes of service to differentiate traffic.

When is a best-effort QoS policy most appropriate?

• A.  when the customer will only transport delay-tolerant data
• B.  when the customer plans to transport data from no more than one multimedia application
• C.  when the CE is self-managed and the customer provides adequate QoS marking
• D.  when the customer has high bandwidth access to the network