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Which three QoS mechanisms will be useful in redesigning the WAN to support the mission-critical application a

A client organization is investigating deploying IP communications. It has a traditional hub- and-spoke Frame Relay WAN. It has five remote sites, and the WAN link speed for each location is 512 kbps. The WAN supports typical IP-based applications, but the client will also be rolling out a new ERP application that will be considered mission critical. Which three QoS mechanisms will be useful in redesigning the WAN to support the mission-critical application and IP communications? (Choose three.)
Select 3 response(s).

Which trait of systems using Cisco Nonstop Forwarding with Stateful Switchover and OSPF is shown in the exhibi

Exhibit:

You work as a network engineer at Domain .com. You study the exhibit carefully. You want to minimize the downtime that results form supervisor engine switchovers on Cisco 6500 Series Switches and Cisco 7600 Series Routers. To achieve this, you are considering deploying a Cisco Nonstop Forwarding with stateful switchover solution using OSPF.
In the Exhibit you can see the output of the show ip ospf neighbor detail command. Which trait of systems using Cisco Nonstop Forwarding with Stateful Switchover and OSPF is shown in the exhibit output and will impact your plan?