Book excerpt: This Army manual, Army Techniques Publication ATP 6-02.71 Techniques for Department of Defense Information Network Operations April 2019, describes the Army network and discusses the capabilities it extends to Army forces. It also discusses how the network enables command and control in Army operations.The principal audience for ATP 6-02.71 is Army professionals and contractors whose duties involve installing, operating, maintaining, and securing the enterprise network. ATP 6-02.71 uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. Terms for which ATP 6-02.71 is the proponent publication (the authority) are italicized in the text and are marked with an asterisk (*) in the glossary. Terms and definitions for which ATP 6-02.71 is the proponent publication are boldfaced in the text. For other definitions in the text, the term isitalicized, and the number of the proponent publication follows the definition.ATP 6-02.71 applies to the Active Army, Army National Guard/Army National Guard of the United States, and United States Army Reserve unless otherwise stated.