You have answers at http://www.google.com/search?hl=en&q=what+is+the+difference+between+L3+%26+L2+managed+switches%3F&btnG=Google+Search
What more could you need than this?
I want to know about L2 managed switches and what is the difference between L3 & L2 managed switches? Another question is how these switches are configured with an IP address?
Thanks in advance.