Need an intro to redundant switching

I'm creating a virtual environment using VMWare, 2 dell poweredge servers, and a miSan storage array.
It is recommended that I setup redundant switches between the poweredge servers and the storage array.
Can someone provide me with some info how to get such a thing started, I'm afraid my networking knowledge is very limited.

From what I've been able to gather thus far, it looks like I need to use managed switches so I can use Spanning tree protocals (something I know nothing about).

Any help would be greatly appreciated.

Thanks