If someone can explain to me why the following was closed as 'off-topic', I would appreciate it. I will use the feedback to improve the question or just remove it.
From you question it's pretty evident that you're not the system administrator responsible for this environment. Wanting to know something for your own education is an admirable thing, but it does not make it an on-topic question for this site.
In this case even if you are the system administrator for the environment involved, your question doesn't meet our quality standards -- There is no evidence of research or troubleshooting, a nearly infinite set of possible causes, and so the question simply cannot be answered as asked.
We have a Q&A here on meta that discusses some things that go into making a good, answerable question, but the basic premise is that you need to do some (fairly extensive) digging on your own, and at least summarize that work so we're not going over the same ground.
I won't speak for any of the five people who voted to hold the question, but...
My primary problem with this is that, by your own admission, it's a purely hypothetical question. You aren't actually trying to solve a real problem. This means that, while it may be possible to "answer" the question, it's entirely impossible for a "correct" answer to be given.
This is the reason that we only allow practical, answerable questions based on actual problems that you face.