How do you network a PC and MacBook Air?

To network a PC and a MacBook Air, ensure both devices are connected to the same Wi-Fi network. On the PC, enable file sharing through the Network and Sharing Center, and set the appropriate permissions for shared folders. On the MacBook Air, use Finder to access the PC by selecting "Network" in the sidebar and entering the PC's IP address or hostname. You may need to install additional software or configure settings depending on your specific network environment.