A jammer must have sufficient power to corrupt targeted information.

• A. Line of sight to the target area
• B. Access to the receiver's antenna
• C. Have sufficient power to corrupt targeted information
• D. Knowledge of the target's encryption keys

Answer: (C)

Jamming works by creating interference that drives the signal-to-interference ratio low enough that the receiver can’t reliably recover the data. To be effective, the jammer must emit enough power within the target band to overwhelm the legitimate signal, taking into account path loss, distance, and receiver sensitivity. Simply having line-of-sight to the area isn’t enough, and access to the receiver’s antenna or knowledge of encryption keys isn’t required for interference to work—the goal of jamming is to disrupt reception, not to decrypt. So the essential requirement is having sufficient power to corrupt the targeted information.