Microsegmentation is a network security strategy that breaks a network into smaller network "segments" to boost security and control over data traffic1. Unlike traditional network security, which primarily defends the network's outer boundaries, microsegmentation focuses on securing individual workloads and devices within the network2. Microsegmentation uses an allow-list model to significantly reduce the attack surface across different workload types and environments3. Microsegmentation is also referred to as application segmentation or east-west segmentation in a multicloud data center4.
Option B is the correct description of microsegmentation, as it captures the essence of applying a zero-trust model and specifying how applications on different servers or containers can communicate. Option A is incorrect, as deploying a container orchestration platform is not a sufficient condition for microsegmentation.
Option C is incorrect, as deploying host-based firewall rules is not a necessary condition for microsegmentation. Option D is incorrect, as implementing private VLAN segmentation is a different technique from microsegmentation. References: An Introduction to Microsegmentation in Network Security. What Is Micro-Segmentation? - Cisco. What Is Microsegmentation? - Palo Alto Networks. What Is Microsegmentation in Networking? Beginner's Guide.