Remember the time when the Internet was connected to your computer through a phone line? The sound of dial-up still haunts us in our dreams… Well, we’ve come a long way since then and you’re probably reading this post using WiFi right now. The question is, how did it get here? How does Wifi actually work?
The roots of WiFi go back to the 1940s. That’s when a popular Hollywood actress and producer named Hedy Lamarr found a way to keep radio signals from being manipulated. That was a major breakthrough, as radio-controlled torpedoes could be easily intercepted at that time. This was a failure for the American army, so Hedy came up with an idea: frequency hopping signals. The people who controlled them could jump from one frequency to another, and make those torpedoes virtually immune to radio interference. How did things keep going?