Some surveillance cameras are powered by DC 12V power supply, and some are powered by AC24V power supply. What's the difference, advantages and disadvantages?

DC is DC power supply, the transmission distance is short, the attenuation is relatively large, and AC is AC attenuation, reducing the transmission distance of power supply lines! Ac consumes more power than DC, and AC suffers more interference than DC. For example, if one outdoor camera uses AC power and the other uses DC Thunder, the AC power is easily damaged.