This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Since the thing being "talked to" is a servlet, would it be fair to assume that the "talking" consists of sending a request to the servlet and receiving the response that it returns? Other scenarios don't really make sense for servlets.