The US Navy data link centered on Link-16, Link-22 and Tactical Targeting Network Technology (TTNT), has built a multi-level communication network to support its joint combat capabilities. In combat applications, data links support air and missile defense, multi domain collaboration, and unmanned operations. Modern warfare focuses on high bandwidth, anti-jamming, and dynamic networking. The US Navy adopts artificial intelligence driven decision-making and integrates various operational resources to enhance combat effectiveness.