text: Signal Support by Army Echelon, Core Competencies, Training, and the Army Network
  Enterprise Operations Center
  2-248. The Defense Information Systems Agency’s regionally-aligned enterprise operations centers
  maintain visibility of their respective portions of the enterprise network. The enterprise operations center
  conducts regional cyberspace missions to support geographic combatant commander priorities and those
  global missions directed by the global enterprise operations center. The enterprise operations center—
  * Directs DODIN operations and defensive cyberspace operations-internal defensive measures in
  its assigned theater.
  * Acts as the regional focal point for integrating unified action partners into mission partner
  environment.
  * Maintains regional, joint situational awareness.
  * Performs cybersecurity and defensive cyberspace operations-internal defensive measures
  functions, as directed by the global enterprise operations center.
  Local Infrastructure (Base, Post, Camp, Station, or Joint Base)
  2-249. The Services continue to maintain their local infrastructure and their ability to support tactical units
  and Service-unique missions. In the local infrastructure—
  * The host Service maintains infrastructure.
  * The host Service provides hands-on labor.
  * The host Service provides defensive cyberspace operations incident response.
  * The local installation provides mission- or unit-specific support.
  * The Services maintain support for their tactical units.
  Regional Top Level Architecture (Joint Regional Security Stack)
  2-250. Top level architectures are access points to the DODIN. Their firewalls, intrusion detection, and
  intrusion prevention sensors represent the border security between the DODIN and the public Internet. In the
  legacy DODIN architecture, the Services typically hosted a top level architecture at each installation. Joint
  information environment replaces over 1,000 installation-based top level architectures with regional top level
  architectures (joint regional security stacks).
  2-251. The joint regional security stacks consolidate the regional security architecture. This reduces the
  cyberspace attack surface by limiting the number of direct interfaces with outside networks. It also reduces
  the size of the specialized cybersecurity workforce needed to secure the network perimeter.
  Note. Refer to Enabling the Joint Information Environment: Shaping the Enterprise for the
  Conflicts of Tomorrow for more information about the joint information environment.
  JOINT THEATER DEPARTMENT OF DEFENSE INFORMATION NETWORK OPERATIONS
  AUTHORITIES
  2-252. The highest-level joint DODIN operations authority in a theater is the Defense Information Systems
  Agency’s enterprise operations center (see paragraph 2-248). The geographic combatant command and joint
  task forces also have joint DODIN operations facilities to control their respective portions of the theater
  network.
  Joint Cyberspace Center
  2-253. A joint cyberspace center is the operational element of the combatant command that plans and
  oversees DODIN operations, defensive cyberspace operations, and offensive cyberspace operations in the
  theater. In conjunction with the theater network operations control center, the joint cyberspace center
  provides comprehensive network situational awareness, so commanders can make informed decisions to
  align network assets and capabilities to mission priorities and defend the network. Refer to JP 3-12 for more
  information about the joint cyberspace center’s defensive and offensive cyberspace operations roles.