Wi-Fi extenders are marketed as a way to expand your Wi-Fi coverage, so it's no wonder people think of them as a dead-zone fix. They're inexpensive to buy, and once you plug one in, you'll usually see an instant improvement in your signal strength. I totally get the appeal.<\/p>\n
But whenever someone tells me they're getting a Wi-Fi extender, I always say the same thing: it probably won't fix that dead zone, and it might even drag down your whole network. Here's how they really work, and what can go wrong.<\/p>\n
Unlike your dual-band or tri-band Wi-Fi router, most cheap extenders only have one radio, which they use to talk to both your router and your devices. These radios can only do one thing at a time, so the extender has to sit and listen to what your router says before switching to broadcast mode to talk to your devices.<\/p>\n
This makes them about half as fast as multi-radio routers that can receive and broadcast at the same time — and that's the best-case scenario, before you add in walls, distance, and everything else fighting for the air.<\/p>\n
Wi-Fi standards moved on, but your old router can still do something useful<\/p>\n
It's not just your speed that suffers. Every time data takes the scenic route through the extender, it picks up a slight delay. This isn't noticeable for stuff like browsing or streaming, since videos buffer ahead of time. But for Zoom calls or online gaming, the added latency manifests as stutters and freezes that will totally ruin your experience.<\/p>\n
An extender can be great for temporarily expanding coverage in a situation where any connection is better than none, but as a 'permanent fix' for a part of your house where you want a strong and stable connection, it's really not up to the job.<\/p>\n
An extender isn't smart; all it does is rebroadcast whatever it receives. If it's a little too far from the router, it won't be able to receive the signal well enough. But once you put it closer, all it does is contribute to an already overloaded network. All the devices already waiting their turn to transmit will just make the extender even slower.<\/p>\n
The 'sweet spot' is about halfway between the router and the dead zone, but before you even buy an extender, it's worth checking where your router is. Good router placement can make such a huge difference that you might not need the extender at all.<\/p>\n
Phones have a habit of clinging to whatever network they connected to first, even if there are better options. So if you connected to the extender in the spare room and then moved downstairs, your phone (or tablet or laptop, actually) might stay clinging to the extender and totally trash your connection.<\/p>\n
If all your gear is top-notch and configured in just the right way, you might be able to avoid this, but even when you do everything right, some devices just make really bad band choices. And I don't mean the kind of "band choices" that involve listening to a band that likes to tell you to look at this photograph.<\/p>\n
Think you know your routers from your repeaters \u2014 put your home networking know-how to the ultimate test.<\/p>\n
What does the '5 GHz' band in Wi-Fi offer compared to the '2.4 GHz' band?<\/p>\n
Which Wi-Fi standard, introduced in 2021, is also known as Wi-Fi 6E and extends into a new frequency band?<\/p>\n
What is the default IP address most commonly used to access a home router's admin interface?<\/p>\n