There is no standard key for this, as it varies from brand to brand. While this shouldn't cause your Wi-Fi access to be inaccessible, if you accidentally the key it can certainly be confusing as to why your Wi-Fi isn't working. Laptops may also have a dedicated key to manage Wi-Fi. If the Wi-Fi isn't working and no other troubleshooting trick seems to work, check your laptop's surfaces and edges for such a kill switch and ensure it hasn't been accidentally enabled. Most of us wouldn't use such a switch in our day-to-day lives, but the switch offers a hard network disconnect for people working in environments where the Wi-Fi has to be turned off at a hardware level instead of a software level. Not all laptops have a physical switch, but some laptops, especially those designed for government and corporate use, have a small physical switch for the Wi-Fi connection.
