SK0-004 · Question #87
A host server in a small business environment does not have virtual switching configured. The NIC on a guest is configured with an IP address that is on a different subnet from the host server…
The correct answer is A. The guest will not have network access to the host or network resources. Without a virtual switch configured, a guest VM has no virtual network fabric connecting it to the host or physical network, and being on a different subnet removes any possibility of layer 3 routing, leaving it fully isolated.
Question
A host server in a small business environment does not have virtual switching configured. The NIC on a guest is configured with an IP address that is on a different subnet from the host server. Which of the following would MOST likely happen in this case?
Options
- AThe guest will not have network access to the host or network resources.
- BThe guest would have access to all network resources.
- CThe guest would have network access to everything but the host.
- DThe guest will have network access to the host server.
How the community answered
(34 responses)- A79% (27)
- B12% (4)
- C3% (1)
- D6% (2)
Why each option
Without a virtual switch configured, a guest VM has no virtual network fabric connecting it to the host or physical network, and being on a different subnet removes any possibility of layer 3 routing, leaving it fully isolated.
A virtual switch provides the layer 2 network bridge or NAT path that allows a guest VM to communicate with the host and external network resources. Without it, the guest's virtual NIC is not connected to any switch fabric. Additionally, the guest being on a different subnet than the host with no gateway reachable means both layer 2 and layer 3 connectivity are absent, blocking all network access.
With no virtual switch providing a network path, the guest cannot reach any resources on the network or the host.
There is no partial connectivity scenario possible here - the absence of virtual switching blocks all traffic, including traffic destined for external network resources.
Even host-only communication requires either a virtual switch or a dedicated host-only adapter; without either, no virtual network link exists between the guest and the host.
Concept tested: Virtual switch requirement for VM network access
Source: https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/get-started/create-a-virtual-switch-for-hyper-v-virtual-machines
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