Final answer:
The best way to deal with powered-on computers connected to a network is to turn the computer off.
Step-by-step explanation:
The best way to deal with powered-on computers connected to a network is to turn the computer off. This ensures that the computer is completely disconnected from the network and reduces the risk of unauthorized access or data breach. Leaving the computer on, but unplugging the network cable and photographing the screen and documenting the programs may not fully protect the computer from potential threats.
Turning off the computer not only prevents any network activity, but also conserves power and prolongs the lifespan of the computer. It is a simple and effective method to ensure the security and privacy of the computer and the network it is connected to.