What type of vSwitch allows communication between virtual machines while segmenting traffic from the host?

A Private switch is designed specifically to facilitate communication between virtual machines while isolating their traffic from the host and any other network segments. This means that virtual machines connected to a private switch can exchange information with each other without being able to communicate with the host system or access any external networks. This segmentation is important for security and resource management, as it prevents external interference and ensures that traffic remains confined to the virtual machine environment.

In contrast, an external switch allows virtual machines to communicate with external networks and the host, thus not restricting access. An internal switch permits communication between the virtual machines and the host, but again, this does not isolate the traffic. Restricted switches are not a commonly defined category in typical virtualization environments, making them less relevant for this context. Therefore, a private switch stands out as the option that successfully segments traffic and protects the inter-VM communication from the host and outside networks.