It may be that the router of this wifi network has inadvertently set up a wireless network card, which prohibits your computer from connecting to this wifi hotspot.
You can only open the wireless network card by re-entering the router settings to connect to this hotspot network. I also set a setting to prevent others from surfing the Internet. Only the wireless network card at home can be connected, but other people's wireless network cards can't be connected.
Wireless local area network (short for wireless fidelity)
Wi-Fi is a technology that allows electronic devices to connect to a wireless local area network (WLAN), and usually uses 2.4G UHF or 5G SHF ISM radio frequency bands.
Connecting to WLAN is usually password protected; But it can also be open, allowing any device within the WLAN range to connect. Wi-Fi is a brand of wireless network communication technology, which is owned by the Wi-Fi Alliance. The purpose is to improve the interoperability between wireless network products based on IEEE 802. 1 1 standard.
Some people call the local area network using IEEE 802. 1 1 series protocols wireless fidelity. Even equate Wi-Fi with wireless Internet (Wi-Fi is an important part of WLAN).