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1) How from vCenter can you see which hosts are ESX and which are ESXi. Can a single report churn out which hosts are running what? Could you provide a screenshot on how to get to this?<br />
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2) Can you have a mix of ESx/ESXi hosts in your environment, if so does that cause issues?<br />
<br />
3) Which came first, i.e. is ESXi a newer version of ESX, or vice versa?
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1) How from vCenter can you see which hosts are ESX and which are ESXi. Can a single report churn out which hosts are running what? Could you provide a screenshot on how to get to this?

2) Can you have a mix of ESx/ESXi hosts in your environment, if so does that cause issues?

3) Which came first, i.e. is ESXi a newer version of ESX, or vice versa?

ESx/ESXi in Vcenter

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.