In what scenario is the specified 'External' connection type used for a virtual machine?

The specified 'External' connection type for a virtual machine is primarily used for internet access. This connection type links the virtual machine to a virtual switch that has access to the physical network, allowing the virtual machine to communicate with other machines on the same physical network as well as access external resources such as the internet.

Using an external connection enables the virtual machine to have the same level of connectivity as a physical machine connected to the local network, which is essential for tasks that require downloading updates, accessing web services, or communicating with other servers and clients located outside the local environment.

The other options refer to different types of connectivity scenarios: for instance, private communications would typically involve an isolated internal network that does not connect to external networks, while communications with the management OS pertain to management tasks and configurations within the virtualization environment. Internal networking usually refers to networking only among virtual machines within the same host, without external access, which further contrasts with the 'External' connection type aimed at internet connectivity.