What a router actually does
A router has two main jobs. First, it connects your home to the internet by receiving the broadband signal coming in from outside. Second, it routes data between all the different devices in your home and the internet, keeping track of which data goes to which device. Think about a typical busy evening: the TV is streaming Netflix, someone is on a video call, two phones are on WiFi, and a gaming console is online. The router is simultaneously managing all of those data flows, sending each piece of data to the right device, keeping everything separate and organised.
Router vs modem: what is the difference?
Technically, a modem is the device that connects to your broadband line and converts the signal into something your home network can use. A router distributes that connection to multiple devices and manages the network. In practice, almost all modern home broadband units are a combined router and modem in one box. Providers call these hubs or gateways but they are doing both jobs simultaneously.
How WiFi actually works
WiFi is a radio technology. Your router broadcasts a wireless signal on specific radio frequencies of 2.4GHz or 5GHz, and devices with WiFi adapters receive that signal and communicate back on the same frequencies. 2.4GHz travels further and passes through walls more easily but is slower and more congested. 5GHz is faster and less congested but has shorter range.
Can I use my own router?
Usually yes, though it requires configuring the new router with your providers connection credentials. Third-party routers and mesh WiFi systems can offer significantly better performance than provider-supplied equipment, particularly for larger homes or those with WiFi dead spots.
