Cisco 640-878 Exam Preparation Material

Updated knowledge to attempt necessary questions Building Cisco Service Provider Next Generation Networks will prove enough to pass the 640-878 exam in the first take.

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Question No. 1

You have installed a new router and configured OSPF on it. However, this new router is not able to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four conditions could cause this problem? (Choose four.)

Answer: A, B, C, E

Question No. 2

Refer to the partial configurations exhibit.

What additional configurations are required to enable inter-VLAN routing for VLANs 10 and 20 on the Cisco ME 3400 switch using the metro IP access image?

Answer: C

Question No. 3

A customer has created a new VLAN for the subnet that was allocated to them. Computers on the subnets can ping their default gateway, but they cannot ping devices in the other subnet. What is most likely the problem?

Answer: B

Question No. 4

Which of the following commands would be used to prevent a switchport from processing Bridge Protocol Data Units?

Answer: C

Question No. 5

Which type of service provider is responsible for offering backbone connectivity services to other service providers?

Answer: C

Question No. 6

Which Cisco router platform supports running either the Cisco IOS or IOS XR operating system?

Answer: E

The CRS-1 platform natively runs the IOS XR operating system. The c12000 platform, originally being an IOS router, can be upgraded to run IOS XR. However, c12000 hardware, including line cards (LC) as well as route processors (RP), must be checked for XR compliance.

TURBOBOOT refers to a fresh boot of the router from ROMMON. TURBOBOOT is required if an IOS router is being converted to IOS XR or as a last resort disaster recovery in the case of CRS-1. If the router is already running an IOS XR image, there is no need to TURBOBOOT the router for an upgrade or downgrade. Later sections in this chapter address the upgrade scenario. This section deals with a fresh boot of the router from ROMMON.

A new c12000 platform can be ordered prebaked as an IOS XR router; however, there will always be cases where an IOS running c12000 needs to install IOS XR.

Question No. 7

Refer to the exhibit.

Which three commands are required on interface fastethernet 5/6 in order to create a trunk link between another Cisco Catalyst Switch? (Choose three.)

Answer: A, B, D

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