Final answer:
To protect against the effects of an EMP, a combination of shielding, specialized entry plates, and filters are employed. The comprehensive approach includes all of these measures to ensure the highest level of protection.
Step-by-step explanation:
The question pertains to the measures used to protect against the effects of an Electromagnetic Pulse (EMP). An EMP can be detrimental to electronic equipment, and there are several strategies to safeguard devices and facilities:
Shielding — involves enclosing electronics in a material that absorbs or reflects electromagnetic energy
Entry Plates — can be used to fortify physical entry points but are not specifically designed for EMP protection
Filters — designed to block unwanted electromagnetic energy from entering through power lines or data lines
All of the above — A combination of these methods provides the most comprehensive EMP protection
Therefore, the correct answer is d. All of the above, as each of these measures contributes to reducing the effect of an EMP on sensitive equipment and infrastructure.