I would like to write a network quiz game.

I would like it to work over a network (using sockets - TCP/UDP), with at least two players. The server will serve the questions. The clients can find the server application using an IP address.

Could anyone give me an idea as to where I should start? I'm very new to C++.
Thanks in advance.

http://beej.us/guide/bgnet/ is one of the most referenced sources. I've never used it, so no guarantees. Other than that, make sure your fundamentals are sound before delving into the network programming. Have you worked in other languages before?