Although, Microsoft release license guidelines for each & every SQL server version. But there are more complex scenarios for licensing then we think.
Best person to answer your all queries over licensing is MICROSOFT itself.
[GD: Post Leach level 99%]
Why a snap? I leached enough of Rohit Garg's post, I felt icky leaching that last bit... So an image presents the information but doesn't steal too much from his SEO... well, so I hope anyway. Being a web curator is waling a fine line...
Seems the questions of the ages are Microsoft License/CAL (well actually any big corp software license related...) so when I saw this, the fact that I could call a human and get answers from the horses mouth so to speak, well I knew I had to grab it for future need.
And if you guys can use it too... :)