Fourth Estate Network Optimization (4ENO)

The Fourth Estate Network Optimization (4ENO) program, managed by the Defense Information Systems Agency (DISA), is a Department of Defense (DoD) initiative focused on consolidating and modernizing the information technology (IT) networks of Defense Agencies and Field Activities (DAFAs) under a unified network environment called DoDNet. The primary goal of 4ENO is to migrate disparate, agency-specific networks onto a single, centrally managed DoDNet, thereby promoting efficiency, reducing redundant IT infrastructure, and enhancing cybersecurity through Zero Trust principles.

Under the 4ENO program, DISA serves as the Single Service Provider (SSP) for DoDNet. The agency is responsible for conducting virtual and physical site surveys, planning and designing network upgrades, procuring and installing modern network equipment, and integrating agency users into the DoDNet environment. The migration process is iterative and spans several fiscal years. Each DAFA undergoes technical assessments and equipment refreshes to ensure compatibility with DoDNet's standards and security requirements.

One of the key objectives of 4ENO is to achieve Zero Trust compliance across the Fourth Estate. As agencies migrate to DoDNet, they immediately benefit from Thunderdome Zero Trust capabilities, which are designed to strengthen cybersecurity and mitigate risks associated with legacy network architectures. This objective aligns with broader DoD priorities to rebuild military IT infrastructure, streamline network administration, and ensure that core IT services are delivered securely and efficiently.

The program includes several major budget line items, each with specific goals. Agency migrations involve the procurement and installation of network hardware and software necessary to transition DAFA sites and users to DoDNet. This includes upgrading outdated equipment, standardizing network infrastructure, and integrating network monitoring tools to enhance visibility and performance. The migration schedule is phased, with an initial phase targeting multiple DAFAs and users, and future phases planned for Combatant Commands and additional agencies.

DoDNet Service Centers are another critical component, serving as the backbone for agency connectivity to DoDNet. These centers require ongoing investments in servers and IT infrastructure to ensure they can support increasing user workloads and maintain high levels of service performance. Upgrades to Service Centers also enable the deployment of enhanced Zero Trust security features and are essential for seamless user access, whether through VPN or onsite connections.

The life cycle refresh line item addresses the need for periodic technical refreshes of network equipment to maintain operational effectiveness and security. Equipment purchased for initial migrations is placed on a five-year replacement cycle, with replacements beginning four years after initial deployment. This ensures that migrated agencies continue to benefit from up-to-date technology and robust cybersecurity measures.