An example of this is TP-Link's N150 USB Wi-Fi Adapter. Plus, internal antennas are cheaper to produce, so compact dongles are more affordable. Nobody wants a massive antenna sticking out of their device. As a result, channels 1, 6, and 11 are the only non-overlapping channels. In the US, there are only 11 channels to choose from-and even that's deceptive because each channel's frequency overlaps with the frequencies of neighboring channels. What's the problem with the 2.4GHz band? As it turns out, it's extremely narrow. Thankfully, most modern routers support the 5GHz band consider a new unit from one of the best router manufacturers if you have an old model. If your router isn't (at least) a dual-band router, then you're stuck using the 2.4GHz band. While modern wireless dongles tend to support both bands, your dongle can only utilize the 5GHz band if your router also transmits on the 5GHz band. Meanwhile, the 5GHz band is faster and more reliable, but has a shorter range and doesn't work with some older devices. The 2.4GHz band is older and supported by most devices, but is slower and more susceptible to interference. Wi-Fi devices can communicate using two different bands. Here are some reasons why your USB Wi-Fi adapter is slow, and what you can do about it.
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