Norwich City Council's enterprise network integrates on-premises infrastructure with Microsoft 365, Azure, and SaaS applications across IT, Finance/HR, and Operational domains. Traffic flows through Palo Alto and Sophos firewalls with zero-trust web proxy, Entra ID authentication, and MFA protecting access to corporate systems, ERP platforms, and citizen-facing services. The architecture separates concerns using VLANs for IT management, corporate, planning, finance, and housing workloads, with a DMZ isolating public-facing applications. Organizations can fork this diagram to customize security policies, add additional SaaS integrations, or adapt the multi-domain structure for their own enterprise network design.