ESX Versions

ESX comes in two main versions
  1) ESX
      > Managed with a built-in service console or the vSphere command-line Interface(VCLI)
      > Available as an installable DVD boot image
  2) ESXi
      > Managed with a BIOS-like direct console or vCLI
      > A high-securty,32MB footprint
      > ESXi Installable - Available as an installable CD-ROM boot image
      > ESXi Embedded - ESX image preinstalled as firmware or burned onto an external USB key by the            hardware vendor