Data segmentation is the best virtual network configuration option to protect virtual machines (VMs). A virtual network is a network that is created and managed by software, rather than by physical devices, such as routers, switches, or cables. A virtual network can provide the same functionality and features as a physical network, such as connectivity, security, or isolation, but with more flexibility, scalability, and efficiency. A virtual network can be configured in different ways, depending on the needs and preferences of the organization. Data segmentation is a virtual network configuration option that divides the network into smaller and separate segments, called subnets, virtual LANs, or zones. Data segmentation can protect the VMs, which are software-based representations of physical machines that run on a hypervisor or a host machine, by providing the following benefits:
* It can improve the performance and availability of the network, as the data segmentation can reduce the network congestion and traffic, and increase the network bandwidth and speed.
* It can enhance the security and privacy of the network, as the data segmentation can isolate and restrict the access and communication between the different segments, and prevent or mitigate the propagation of the attacks or threats within the network.
* It can simplify the management and troubleshooting of the network, as the data segmentation can organize and group the network resources and devices based on their functions, roles, or policies, and facilitate the monitoring and control of the network traffic and performance. References: [CISSP All-in-One Exam Guide], Chapter 4: Communication and Network Security, Section: Virtualized Networks, pp. 205-206.