This bill requires the Secretary of Defense to designate the Joint Force Headquarters-Department of Defense Information Network as a subordinate unified command under U.S. Cyber Command within 120 days of the law's enactment. The change would establish clearer command structure and authority over the military's computer networks and their defense against cyber threats. Once the designation is made, the Secretary of Defense must notify military departments, the Joint Chiefs of Staff, combatant commanders, and other key Defense Department officials about the reorganization and the new entity's role as the lead organization for network operations and security. The bill does not specify new funding amounts or appropriations for this reorganization. This legislation aims to modernize how the military manages and protects its information infrastructure from cyber attacks.