How many policies are used to allow communication between applications?

To facilitate communication between applications in the Illumio Core environment, two extra-scope policies are typically employed. This is because each application is likely to have its own specific communication needs which require distinct policies to be defined for effective traffic management and compliance with security rules.

These extra-scope policies allow for the fine-tuning of access controls based on the specific applications involved. They help to define what traffic is permitted between the applications while maintaining a solid level of security. By implementing two policies, you can create a more comprehensive framework that accommodates potential variations in communication patterns and security requirements between the applications.

The approach of using two extra-scope policies also aligns with established best practices in network segmentation and access control, where multiple policies allow for greater granularity and flexibility in managing application interactions.