Answer:
One valid method to connect to a WLC and configure a new WLAN is through a web browser. The WLC has a web interface that can be accessed by entering its IP address into the browser's address bar. Once logged in, the user can navigate through the menus and configuration options to create a new WLAN. Alternatively, the user can also connect to the WLC through its CLI using telnet or SSH. This method requires knowledge of the command line interface and appropriate commands to configure the WLC and create a new WLAN.