Scenario:
Your company hosts a Voice Over IP (VoIP) service for its customers. Your Voice Operations center is responsible for all VoIP applications, including servers, gateways, and provisioning. The NOC is responsible for the network infrastructure, including LAN, WAN, Firewalls, and QoS.
Your Voice Operations Center started receiving calls in the early morning from customers who did NOT have dial tone and could NOT place or receive calls. The Operations Center was UNABLE to find any problems with their applications. At this point, they switched from the primary call manager to the secondary call manager to attempt to resolve the problem. This resolved the problem and customers had dial tone and were able to place and receive calls.
It is now after 8:00 AM and both the Voice Operations Center and NOC are fully staffed for peak activity hours. The tickets opened earlier are escalated and you are assigned to work with the Voice Operations Center to find and fix the problem. You review the trouble tickets and then join the scheduled teleconference to resolve the problem.
As a NOC member, which three troubleshooting steps should you perform from the network side to help isolate the problem? (Choose three.)

• A. Check to see if the NOC operators missed alarms from the NMS system during the night.
• B. Call a telephone number from a trouble ticket to verify that a connection can be made.
• C. Run a load test to verify QoS during peak network activity.
• D. Determine if any network changes (e.g., IOS updates) were made prior to the first customer calls
• E. Request syslog files from both call manager servers.
• F. Verify that you can ping both the primary and secondary call managers.

You are working at a service provider supporting the core network. While proactively monitoring syslog, you notice that two power supplies have failed on one of the core routers. The router has five power hot-swappable supplies in total. Three are required to be working to support the power draw of the router. At this point, the router is still functioning correctly. It is now several hours before peak traffic will be present on the network. The next safe time for performing physical maintenance is not until after the peak traffic window. Which two steps should you take to minimize network impact during peak traffic? (Choose two.)

• A. Check the syslogs of other network devices in the same location for failed power supplies.
• B. Implement a provisioning freeze so that no new network links are activated.
• C. Redirect traffic away from the router.
• D. Dispatch a technician to swap power supplies with onsite spares.

According to ITIL@ v3 framework, which incident ending step involves the validation of the initial incident record parameters to ensure that they are accurate prior to the final incident record entry?

• A. closure categorization
• B. incident historical documentation
• C. user satisfaction survey
• D. ongoing or recurring problem determination

Refer to the exhibit.

The network diagram shows a video service provider. The IPTV video source is connected to R1, whereas the clients are connected to R6. Traffic flows from R1 to R6 both as unicast as well as multicast. Unicast traffic load is greater than multicast by several orders of magnitude. There are two paths from R1 to R6, each of them traverses through the R3 router. The path R1-R2-R3-R6 has a lower OSPF cost path compared to R1-R5-R4-R3-R6. The service provider took into account several design criteria and implemented TE tunnels with forwarding adjacency between R1 and R3 both from the perspective of load sharing as well as for fast reroute. Bringing up TE tunnels had the affect of dropping multicast traffic at the R3 router. On troubleshooting the issue, you noticed that the OSPF route to the source of multicast traffic was being learned over the TE tunnel, and this has caused the RPF check to fail.
Considering this problem, what are two solutions to prevent multicast traffic from being affected by the RPF check failing due to the TE tunnel? (Choose two.)

• A. Use multicast-intact with forwarding adjacency.
• B. Configure the TE tunnel to use autoroute announce as opposed to forwarding adjacency, and circumvent the RPF problem by using the multicast-intact command.
• C. Create a static mroute on R3 with the RPF pointing to the TE tunnel.
• D. Enable PIM on the TE tunnel on both of the headend routers.
• E. Use multitopology routing if the software supports it.
• F. Enable on the core facing links a new routing protocol such as another OSPF process or ISIS.