Wi-Fi 2.4GHz và 5GHz là gì? Nên dùng Wi-Fi 2.4GHz hay 5GHz 1

Wifi Router It is an indispensable device if you want to expand the range of your home Wifi network. Adjacent routers support 2 network bands 2.4 GHz and 5GHz. So the parameters What is 2.4GHz, 5GHz? ? difference between 2.4GHz and 5GHz Wi-Fi Why is the 5GHz router more expensive than the 2.4GHz router, let’s find out with tip.com.vn.

What is i. 2.5GHz? What is 5GHz?

2.4GHz and 5GHz are terms that refer to the frequency range of the router or network device that is transmitting these signals. The biggest and most striking difference between the 2.4GHz and 5GHz frequencies is speed and range.

WiFi networks have frequencies and wavelengths and these two factors will affect how waves propagate and the distance that waves are transmitted.

What is 2.4GHz and 5GHz Wi-Fi?  2.4GHz or 5GHz Wi-Fi recommended 1

Wireless connectivity in general and Wi-Fi in particular are developing extremely strongly and with wide coverage, so the 2.4GHz band is very popular. However, because of the popularity of devices using 2.4GHz, 2.4GHz waves are not stable. This is the reason the 5GHz network band started to be used more commonly.

II. The difference between 2.4 Ghz and 5 GHz Wi-Fi.

The biggest difference between 2.4GHz and 5GHz Wi-Fi is speed and distance.

– The 2.4Ghz band has a longer wavelength so the transmission distance is longer. However, due to the long wavelength, it is easier to lose signal, so the speed of 2.4Ghz is lower and not as stable as 5Ghz.

– The 5GHz band is independent from the 2.4GHz band and uses shorter waves. Therefore higher 5GHz speed is more stable. However, 5GHz has the weak point of short transmission distance as well as low obstacle penetration.

What is dual-band and tri-band?

A dual-band router is a router that can transmit both 2.4GHz and 5GHz signals at the same time. And this is basically a router capable of providing you with two parallel 2.4GHz and 5GHz wireless networks.

  • 2.4GHz : Wide coverage, good penetration through walls, unstable low speed
  • 5GHz: High-speed narrow coverage

Dual-band routers come in two types:

  • Selectable dual-band. The dual-band selectable router has both 2.4GHz and 5GHz Wi-Fi networks, but you can only use one network at a time. We will have to use a toggle switch to select the type of band you want to use.
  • Simultaneous dual-band. A simultaneous dual-band router is a router that can broadcast separate 2.4GHz and 5GHz Wi-Fi networks at the same time, giving you two Wi-Fi networks that you can choose from as you set up your device. establish connection. Some routers may also allow you to assign the same SSID to both bands so that devices only see a single network, even though both networks are still operating side-by-side. This type of router will cost a bit more than dual-band selectable routers, but is completely acceptable compared to the benefits it brings.
  • A tri-band router is a router capable of transmitting three networks simultaneously, including two signals in the 5GHz band and one in the 2.4GHz band. The reason for this is to help reduce possible congestion in the network. So if you have multiple devices using the 5GHz connection at the same time, such as streaming in high definition or even streaming 4K video, you can see a clear benefit from using tri-band routers. .

III. Should choose the 2.4GHz or 5GHz band?

If possible, use a wired connection for the best speed. However, if you need to use a wireless connection, choosing which band to use depends on each specific condition. Of course, upgrade to 5GHz if conditions permit the best.

What is 2.4GHz and 5GHz Wi-Fi?  2.4GHz or 5GHz Wi-Fi is recommended 2

As follows:

– If you need high and stable network speed and near the Router, use 5GHz.

– If there are many obstacles around you, the 5GHz wave now becomes less effective, long distances can not use 5GHz, so in this case you use 2.4Ghz is reasonable.

In summary, consider the following conditions before deciding whether to use the 2.4GHz or 5GHz band:

  • Need high speed to play games and watch movies, so upgrade to 5GHz.
  • Living in a densely populated area with many Wi-Fi routers or devices using the 2.4GHz band, you should switch to 5GHz
  • Using a router that supports 2 bands, you should use 5GHz for devices that support it and 2.4GHz for the rest.
  • If your device supports both bands, consider whether it is necessary to use 5GHz for that device.
2.4GHz 5GHz
The highest connection speed is 450Mbps or 600Mbps Connection speed up to 1300Mbps
IEEE 802.11b . standard operating frequency IEEE 802.11a standard operating frequency
Less bandwidth than 5GHz, less data transmission 2.4GHz higher bandwidth, more data transmission
Transmission range beyond 5GHz Transmission range is shorter than 2.4GHz
Better penetration of walls and solids than 5GHz The ability to transmit through solid objects, walls is worse than 2.4GHz


By now, you must have known about 2.4GHz and 5GHz concept then isn’t it? Surely after this article, you can clearly understand when to use which network, right? If possible, invest in a router that supports both bands. Good luck.