The IP address 192.168.l.1 and the address http://192.168.1.1 are used to enter the default WiFi router settings. To log in to the router, in the so-called Personal Area, you need to enter the login and password admin admin admin. In TP-Link routers, log in by tplinklogin.net or tplinkwifi.net.
Changing the settings of any wireless router does NOT require additional software or drivers. You can configure the device on any computer or laptop, phone, or tablet. Some router models can only be set up if you have a network cable. But most modern routers can be set up wirelessly, over Wi-Fi.
Therefore, it is possible to log in to 192.168.l.1 and configure the router: both with a network cable, and without it - using Wi-Fi technology. The general login order does not change. The Internet connection is not required.
In the example, Yandex. Browser, but any browser will do (Chrome, Safari, Mozilla Firefox...). The IP of your router may be different from 192.168.l.1 (see table below). The most popular is 192.168.l.1 (Zyxel, TP-Link, Sagemcom, Asus, Tenda), the second most popular is 192.168.o.1 (D-Link, Netgear). To configure TP-Link it is convenient to use the following addresses: tplinklogin.net and tplinkwifi.net. But in my case, http://192.168.1.1 is fine. The admin admin login and password may not work either.