What is the minimum number of ESXi hosts required to support vCenter High Availability? (Choose the best answer.)

An administrator is tasked with upgrading an existing vSphere environment to version 7.0. There are existing VMFS3 and VMFS5 datastores in the environment.
Which statement is true regarding this upgrade?

Which two VMware features are supported in a virtual machine using Intel Software Guard Extensions (Intel SGX) technology? (Choose two.)

A vSphere environment is configured with 1 Gigabit Ethernet for vSphere vMotion. The application team is complaining that when they try to migrate a powered-on virtual machine, the progress is slow and unsuccessful the majority of the time.
Which two recommendations should the administrator make to improve vSphere vMotion performance?
(Choose two.)

An administrator wants to implement virtual machine encryption.
Which component encrypts the virtual machine files? (Choose the best answer.)