This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
You should have searched the Sockets and Internet Protocols forum. You'd get over 100 hits, including this helpful topic. Since this question really belongs in that forum, I'm going to lock it here. Feel free to follow up in the Sockets and Internet Protocols forum.