MongoDB Atlas Resource Policies are designed to enhance database security by implementing a defense-in-depth strategy, which involves deploying multiple, independent layers of security controls to protect against potential breaches. These policies focus on three main areas: network access control, geographic and cloud platform control, and protocol security. Network access control manages which IP addresses can connect to the database, blocking dangerous configurations such as wildcard IPs and enabling private networking solutions. Geographic control ensures data remains in compliant regions, adhering to regulations like GDPR and HIPAA, while cloud platform restrictions maintain operational consistency and compliance. Protocol security enforces secure communication standards, such as minimum TLS versions, to prevent protocol downgrade attacks. By layering these policies, organizations can create a robust security architecture that balances protection with operational flexibility, reducing the risk of data breaches and configuration errors. MongoDB Atlas Resource Policies are provided at no additional cost, requiring an investment of time to thoughtfully design and implement a comprehensive policy stack that strengthens overall security architecture.