The minimum requirements to deploy a managed device inline are: - Inline interfaces (a pair of interfaces configured to operate inline) - MTU (Maximum Transmission Unit) setting for the inline set - Mode (the device must be set to inline mode) Security zones, while often configured and useful for policy application, are not strictly required as a minimum for deploying a device inline because the system can remove existing zones when creating inline pairs and security zones can be added after the inline set is created.