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Question :-

Scenario: an Administrator has a single XenApp 6.5 farm with an equal number of servers in two datacenters. Datacenter 1 is used for production and datacenter 2 is used for disaster recovery failed. Users should connect to the XenApp servers in the datacenter 2 only if all servers in the datacenter 1 are offline or are running a full load. Which two steps should the administrator take to meet the requirements? (Choose two)
Create a preferential load balancing policy
Create and assign a custom load evaluator at each datacenter.
Create an OU, a worker group and a zone for each datacenter's servers.
Create a Citrix load balancing policy with appropriate worker group preference settings.

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