2-20. Friendly, enemy, adversary, and host nation networks, communications systems, computers, cellular phone systems, social media websites, and technical infrastructures are all part of cyberspace. Cyberspace operations are the employment of cyberspace capabilities where the primary purpose is to achieve objectives in or through cyberspace (JP 3-0). The interrelated cyberspace missions are Department of Defense information network operations, defensive cyberspace operations, and offensive cyberspace operations. For more information on cyberspace operations, see FM 3-12 and JP 3-12 (R).