Which type of virtual network should you implement to allow communication between virtual machines while isolating them from the production network?

Implementing a private virtual network is the correct choice for allowing communication between virtual machines while ensuring they remain isolated from the production network. A private virtual network creates a dedicated environment where virtual machines can communicate with each other without any access to the external or production networks. This ensures that sensitive data or testing environments are kept separate from live environments, minimizing the risk of interference or security breaches.

A public virtual network, on the other hand, connects virtual machines to the wider internet, which does not align with the need for isolation. A bridged network connects virtual machines directly to the physical network, enabling them to communicate with external resources, which also compromises the desired isolation. Finally, a host-only network allows communication between the host machine and the virtual machines, but does not facilitate inter-VM communication in the same way a private virtual network would, and does not connect to production resources. Therefore, the private virtual network is the most suitable option for achieving the specified isolation and communication requirements.