Microsegmentation goes beyond traditional network segmentation by defining security zones at the individual workload or application level. Each service receives its own firewall rules that specify exactly which traffic is permitted. If an attacker compromises one system, lateral movement through the network becomes extremely difficult. Microsegmentation is a core building block of zero-trust architectures. You can implement it in software using host firewalls, service meshes, or hypervisor rules. The initial effort for rule configuration is significant, but it pays off through a substantially reduced attack surface.