What is beacon probing used for in vSphere networking?

The typical option is selected while running the New Virtual Machine Wizard in the vSphere Client;
Which four specific configuration options are skipped during virtual machine creation? (Choose Three)

A 2TB VMFS3 datastore has been upgraded to VMFS5. The original block size was 2MB.
What effect will this upgrade have on the maximum file size supported by the datastore?

An administrator notices that log files kept on an ESXi host are being rotated very quickly, initiating the troubleshooting of an issue?
Which two configuration changes will resolve this issue?

An administrator has determined that storage performance to group of virtual machines is reduced during peak activity. The virtual machines are located in VMFS datastore called Production 1 on an active-active storage array. The ESXi host running the virtual machine is configured with an MRU multipathing policy.
Which two actions can be taken to improve the storage performance of these virtual machines? (Choose two)

An administrator is working to upgrade the host and virtual machines in vSphere 5 deployment Upgrade Baselines.
Other than host patches, which three items can be added to a vSphere 5 Baseline? (Choose three)

Which of these factors indicates a high likelihood that the performance of a virtual machine is being contained by disk I/O?

Which two statements are true about port groups and VLANs defined on a vNetwork standard Switch? (Choose two)

An administrator plans to deploy ESXi 5.x on a blade server containing no local disks.
Which three options are supported for use in place of local disks? (Choose three)

It appears that a single vCPU virtual machine in a resource pool called Production is available in having performance problem because it does not have enough CPU Shares.
"Which two methods can be used to improve performance and reduce CPU contention of this
virtual machine while maintaining compatibility with DRS? (Choose two)