I have two laptops that I want to network together to play Diablo 2 on. However, one of the computers is so old, it does not have any networking ports. All I have on hand is a card that adds a dial-up port. Can I use this to network the two laptops together, or do I need to buy an Ethernet card?
Your cheapest bet would be to use a cross over cable and directly connect the two PC's. PCI network cards are pretty cheap and depending on the distance between the two, your cable shouldn't be to much.
Just make sure your getting a crossover cable and not a regular straight through cable. They are usually red instead of blue.