This white paper explores how Zero Trust security principles can help public sector organizations defend against modern cyber threats amid cloud adoption, remote work, and expanding IoT environments. It highlights why “never trust, always verify” is critical for government agencies and explains how foundational services like DNS, DHCP, and IP address management play a central role in securing data, users, and devices. Through real-world public sector use cases, the resource outlines practical guidance for building a resilient, scalable Zero Trust architecture.