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What are 2.4 GHz and 5 GHz Wi-Fi bands: what is the difference and which one to choose?

Answer

Wireless data transmission networks based on IEEE 802.11 standards use two main frequency bands: 2.4 GHz and 5 GHz. Each of them has its own technical characteristics that determine the signal range, the ability to penetrate obstacles, and the maximum data transfer rate in real-world operating conditions.

The 2.4 GHz band is older and more widespread; it has a long signal propagation range and overcomes walls and floors well. However, this band has only three non-overlapping channels and is heavily cluttered by household appliances, microwaves, Bluetooth devices, and neighbor networks, which leads to interference and reduced speeds. The 5 GHz band offers significantly greater channel width, high operating speeds, and less interference, but its signal penetrates thick walls less effectively.

When choosing the optimal band for a home or office network, you should follow these recommendations:

•Use the 5 GHz band for devices that require high speed and minimal latency, such as game consoles, TVs streaming high-definition video, and work laptops.
•Use the 2.4 GHz band for smart home gadgets, sensors, video surveillance systems, and older smartphones for which connection range is critical rather than speed.
•On modern dual-band routers, it is recommended to enable the smart network combination feature under a single name so that the access point automatically switches the device to the optimal frequency.
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