Elance Exams Answers PDF file

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You are asked to help troubleshoot a virtual data center that is suffering from poor performance. There are 4 ESXi hosts running vSphere Enterprise Plus, each has dual 8 core Xeon processors, 48GB of RAM and each has 8 local drives configured in a RAID6 + Hot Spare array and 6x 1Gbps NIC configured in an active/standby pairs for management, vMotion, and VM network traffic. Each hosts is running between 30-40 virtual machines. You check esxtop to try and determine the cause. PCPU UTIL (%) is 30% MEMCTL/MB is 0 DAVG/CMD is 30ms %DRPTX is 0 What is the likely cause of the performance problems?

The virtual machines do not have enough RAM allocated. Increase the amount of RAM in each ESX/ESX host using the hot add feature.
The virtual machines do not have enough RAM allocated. Increase the amount of RAM in each ESX/ESXi host using vMotion to migrate all VMs off the host, upgrade it, and migrate them back.
The network infrastructure needs to be upgrade to at least 10Gbps NICs and switches to support this number of virtual machines.
The virtual machines do not have the necessary throughput or IO from the configured storage. Consider shared storage or reconfiguring the array to meet the demands of the virtual machines.
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