Electronic defense protects the electronic equipment, vehicles, communications, infrastructure, firepower, and headquarters of friendly and allied forces from enemy electronic attacks. Electronic defense is also executed to shield friendly forces from their electronic attack methods. 

Examples of active electronic defense techniques include technical modification of certain equipment, such as frequency-hopping spread spectrum military radios, to adapt to changing electronic warfare conditions. In the realm of passive electronic defense forms, the training of operator personnel, especially in response to the daily conditions and potential methods the enemy might use, plays a pivotal role. Electronic countermeasure equipment is categorized under electronic defense.