NAT gives a virtual machine access to network resources using the host computer's IP address and a port through an internal Hyper-V Virtual Switch. Network Address Translation (NAT) is a networking mode designed to conserve IP addresses by mapping an external IP address and port to a much larger set of internal IP addresses.

You can use NAT to share a connection to the public Internet through a single interface with a single public IP address. The computers on the private network use private, non-routable addresses. NAT maps the private addresses to the public address.

NAT was created to enable several machines to share a single external IP address. A port-remapping NAT maps an internal IP address and port for a connection to an external IP address with a new port number. The new port number allows the NAT to correlate return traffic with the original communication.