Aspreads from one machine to another rapidly without human action

Answer;

-A worm

A worm spreads from one machine to another rapidly without human action.

Explanation;

-Computer worms are similar to viruses in that they replicate functional copies of themselves and can cause the same type of damage.

-In contrast to viruses, which require the spreading of an infected host file, worms are standalone software and do not require a host program or human help to propagate.

- To spread, worms either exploit a vulnerability on the target system or use some kind of social engineering to trick users into executing them.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

technology is the application of the knowledge gained by science.