Over the past few years, we've collected answers to most questions asked in this forum. You can find the questions, easily browsable, followed by answers, searchable in your web browser, within the Forum FAQ. Ten out of ten webboard readers agree: search the Forum FAQ for instant answers to your questions! (In fact, reading the whole thing may teach you almost all you'll ever want to know about what there is you need to know about networking :-)
You are likely to get an answer to your question much faster by reading the Forum FAQ, than by posting a question in the forums and then waiting for someone else to answer.