Correlating VMware Product Build Numbers to Update Levels

This is a Knowledgebase Article that I have bookmarked and use quite often, especially when determining what patch level you are on with things like ESXi.  If you look in vCenter or directly on the ESXi server, you will simply see the product build number… something like:  1746018  for an ESXi host and you know roughly that it is ESXi 5.5 but by utilising this knowledgebase article you can discover that you are actually running ESXi 5.5 Update 1a – which makes it easier for you to know that you should move to Update 2.

The link is here, hopefully you will find it as useful as I do:

http://kb.vmware.com/kb/1014508