The research the community asks of you is the research to *answer* your question, not to *ask* it.  I freely accept that you've done enough research to find out what load-balancing options are generally available, but if you hadn't done that I suspect the question would look like "*I need to know about load balancers, please help me*" and would already have been closed.

What we're looking for you to do is research towards *answering the question as asked*, so that we don't duplicate work you've already done.  If you haven't done any such work, then a downvote may be appropriate.

But as others have already noted, the question as written could have a whole book by way of answer - see, eg, http://shop.oreilly.com/product/9780596000509.do - and is thus almost certainly too broad for SF.  [Our guidelines][1] are fairly clear on that:

> Your questions should be reasonably scoped. If you can imagine an
> entire book that answers your question, you’re asking too much.


  [1]: http://serverfault.com/help/dont-ask