Hyper-V

https://learn.microsoft.com/en-us/training/modules/configure-manage-hyper-v/

The Hyper-V hypervisor takes full control of the hardware virtualization capabilities and doesn't expose them to the guest operating system (OS).

Virtual switch types

A virtual switch controls the flow of network traffic between the VMs hosted on a Hyper-V Server, as well as between the VMs and the rest of the organizational network. The following table details the three types of virtual switches: internal, external, and private.

Type	Description
Internal	An internal virtual switch is used to communicate between each of the VMs on a Hyper-V host, and to communicate between the VMs and the Hyper-V host.
External	An external virtual switch is used to map a network to a specific network adapter or network adapter team. Hyper-V also supports mapping an external network to a wireless network adapter. To map an external network to a wireless adapter, install the Wireless local area network (LAN) service on the Hyper-V host server and ensure that the Hyper-V Server has a compatible network adapter.
Private	A private switch facilitates communication between the VMs on the same Hyper-V host. Private switches can't be used to communicate between the Hyper-V host and VMs.

Network Settings	Internet	VM to VM	VM to Physical network
Internal	No	Yes	Yes
Private	No	Yes	No
External	Yes	Yes	Yes

Question

What type of virtual switches will facilitate communication between the VMs running on the same Hyper-V host, but not between the VMs and the Hyper-V host?

a) External

b) Internal

c) Private

In the configuration of a virtual network, it is possible to set up a Virtual LAN (VLAN) ID and link this ID with the network. This setup enables the extension of existing VLANs on an external network into the VLANs within the network switch of the Hyper-V host.

Example:

Now step by step explain how to create a external virtual switch

1. Open Hyper-V Manager: Launch Hyper-V Manager on your Windows machine. You can usually find it in the Start menu or by searching for it.

1. Open Virtual Switch Manager: In Hyper-V Manager, in the Actions pane on the right side, click on "Virtual Switch Manager." This will open the Virtual Switch Manager window.

1. Select External: In the Virtual Switch Manager window, select "External" from the list of options on the left side. This will allow you to create an external virtual switch that can communicate with physical network adapters.

1. Create External Virtual Switch: Click on the "Create Virtual Switch" button. This will open a new window where you can configure the external virtual switch.

1. Name the Virtual Switch: Give your virtual switch a name in the "Name" field. In this scenario we are choosing "External VSwitch" as the name. Select the network adapter you will be using to connect to the Internet or the one that currently has an Internet connection.

1. Configuring VLANs (Optional): For VLAN configuration on your virtual switch, simply select "Enable virtual LAN identification." Afterwards, input the designated VLAN ID in the provided field.In this scenario we are not configuring VLAN's . Click "OK" to create external virtual switch.

1. Click "Yes" to confirm and create the external virtual switch.

We have created External Virtual switch now, we can confirm its existence in the Virtual Switch Manager.

Follow the same steps to create Internal Switch and Private Switch, we don't select any network adapter in those cases.

We can also confirm the existence of out switch by running ipconfig in cmd