Upgrading VMware vSphere environment. Prepare your environment before upgrading. Requirements:- 1)first upgrade the vCenter server. 2) check host hardware compatibles to support esxi versions. 3) Update host firmware version (For Ex. HP server? update system firmware ILO and BIOS, controller version) (If cisco UCS? check the ucs manager and FI versions 3.0 or 3.2, 4.0…