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Are you having poor WiFi speed?
I believe that when using Wi-Fi, many people will experience slow downloads, especially when watching videos, they always have to wait for buffering to complete. Sometimes rebooting router or changing router does not solve problem, but broadband speed is clearly enough, in fact, this may be a problem with network card.
When faced with a situation where network speed is poor, I believe that many people only consider reasons for broadband access or routers, and many people do not think about wireless network cards. At present, wireless network cards commonly used in computers only support 11n wireless network cards, that is, 2.4GHz frequency band. There are too many WiFi signals in this frequency band. Now we open mobile phone's WiFi and randomly search for WiFi signals. which you can find, basically everything is 2.4GHz band. If it is 5GHz, it will usually be noted in name, but 5GHz WiFi routers are still not popular enough.
Wi-Fi in 2.4 GHz band has a maximum speed of 300 Mbps. The wireless network cards in electronic devices we use actually support different maximum speeds. Some of them only have 72Mbps, so it's impossible to match 300Mbps with 2.4bps. The router is GHz, so there will be stuttering, especially when you use wireless LAN to transfer files, it seems more obvious.
Many routers now use 11ac standard, but 11ac standard for optical routers is not acceptable. The wireless network card must also support 11ac standard to be useful. Only when baud rates of wireless network card and router match can you see actual network speed. The reverse is same, if your mobile phone supports 11ac, but router uses 11n, you won't be able to experience 11ac.
Now, many new mobile devices have popularized 11ac standard, and the Wi-Fi data rate can usually reach 867Mbps.
So, if you want to improve internet speed at home, in addition to upgrading your broadband and replacing routers, you should also check if your equipment supports the latest wireless data standards. If not, then mobile phones and computers should also be updated. A little.