The threats as well as the risk and vulnerabilities are present with the WLAN. The WLAN would encounter security issues with the range of the signal which is wireless, SSID broadcasting, password security and the packet sniffing or the capturing of signal.
Every application has access to specific opened port. If you only make a exception for the specific application only that application can bypass the firewall.
3. Hold down the CTRL, ALT, and DELETE keys simultaneously, click Task Manager option, then right-click the frozen program's name, and finally click the end task button.
Well potential energy is energy that is in a object while its not moving so i would go your third option