Just as the internet has evolved, so too have connection methods. Early modems relied on telephone cables and prevented users from making calls while online – and made downright iconic sounds. These old devices were slow and only supported one connected computer at a time. Nowadays, you can hook multiple PCs and several smart home devices into the network, all using one modem. Sort of. Technically, you need a modem and a router, which has led to all sorts of confusion. What’s the difference between a modem and a router? Do you need both or just one?