T level

  Types of Hyper-V Virtual Switches Using Virtual Switch Manager, you can create three types of Hyper-V virtual switches: External  switches are bound to the physical network cards located in the host. They provide VMs located on them access to the physical network to which the Hyper-V host is connected. The External switch can also share management traffic and VM traffic on the same switch, which is one of the options that can be set when creating the external switch. Internal  switches are not bound to a physical network card. They only allow traffic between VMs and the host itself. However, in 2016, new functionality was added to allow external connectivity via NAT from the Hyper-V host: the NAT forwarding internal switch. Private  switches are only used for virtual machines to communicate with each other. This type can be useful for specific types of traffic such as a cluster network only if you are using one host (as it can’t be used between hosts).