The SDA NEBULA Standard document establishes the requirements and specifications for the Network Established Beyond the Upper Limits of the Atmosphere (NEBULA), integral to the U.S. Space Development Agency's Proliferated Warfighter Space Architecture (PWSA). The NEBULA Standard aims to provide robust communication protocols for space-to-space and space-to-ground interactions, ensuring interoperability among evolving space vehicle (SV) technologies. Key points include detailed networking architectures, requirements for information assurance, and requirements for inter-node communication using Multiprotocol Label Switching (MPLS). The document emphasizes both classified (red-side) and unclassified (black-side) data management through controlled encryption and routing frameworks. It outlines roles of various network devices, mandates on traffic management, and stipulates specifications for IP addressability and reconfiguration capabilities. Notably, the NEBULA Standard is modular, allowing for future expansions and enhancements, while ensuring critical data security in a multi-domain operational context. This standard is vital for maintaining the United States' technological and military supremacy in space, particularly in response to potential adversaries' threats.