Microsegmentation is implemented through virtualised server approaches in the hypervisor (virtual firewalls or encapsulated overlays such as VXLAN with policy enforced outside the workload), host-based agents using native host firewalls across data centre, cloud, bare metal and hybrid environments, or identity-based policies that name which services may call which, enforced by mutual authentication and authorisation on every request. Identity-based policies are environment-agnostic, testable by exercising the application, expressible as policy as code in pipelines, and give fine-grained control of north-south and east-west traffic; segment-based approaches using VLANs and address rules are understood to carry a heavy mapping and change-management burden.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.