text: Appendix A
  Reporting Procedure
  A-46. Joint spectrum interference resolution reporting takes place through secure channels. Spectrum
  managers should not delay reports due to a lack of complete information. They can submit an initial report
  while attempting to resolve the incident, and follow-up reports to provide additional information, as it
  becomes available.
  A-47. The submitter of a joint spectrum interference resolution report determines the appropriate security
  classification by evaluating the sensitivity of the electromagnetic interference on the affected system and
  considering the classification of the text comments.
  A-48. Army units report through their chain of command up to the geographic combatant command, and to
  the U.S. Army Communications-Electronic Services Office. Message precedence of a joint spectrum
  interference resolution report depends on the urgency of the reported situation. Normally reports are routine
  or priority precedence, unless the originating unit believes the incident is hazardous to military operations.
  In this case, the unit reports using immediate precedence.
  CYBERSPACE ATTACKS
  A-49. U.S. networks face continuous risk of cyberspace attacks. Cyberspace risk increases substantially when
  operating against a peer threat in a contested environment. DODIN operations personnel implementing
  cybersecurity measures can prevent many attacks. If an enemy cyberspace attack breaches cybersecurity
  measures, it may require defensive cyberspace operations support to mitigate. Refer to FM 3-12 for more
  information about defensive cyberspace operations support.
  Denial of Service
  A-50. A denial-of-service attack seeks to make a computer or network resource unavailable to its intended
  users by disrupting services of a host connected to the Internet. An attacker floods the target computer or
  network resource with more requests than it can handle to overload the system and prevent it from fulfilling
  legitimate requests.
  A-51. Denial of service attacks can affect any internet protocol network system, including—
  * Mission command information systems.
  * Logistics systems.
  * Administrative systems.
  * End user devices.
  Preventive Measures
  A-52. Good cybersecurity practices can prevent or lessen the effects of a denial of service attack.
  Cybersecurity personnel should—
  * Maintain current anti-virus software and virus definition files.
  * Maintain properly configured network firewalls.
  Indicators
  A-53. Operator indications of a denial of service attack may include—
  * Unusually slow network performance when opening files or accessing websites.
  * Request timeouts.
  * Widespread unavailability of a website or network system.
  Reaction
  A-54. When faced with the symptoms of a denial of service attack, DODIN operations personnel should—