You have a computer named Computer1 that has the Hyper-V feature enabled.
You have two virtual machines named VM1 and VM2 hosted on Computer1. VM1 can communicate with VM2
and Computer1. VM1 fails to connect to the Internet- Computer1 can connect to the Internet.
You need to ensure that VM1 can connect to the Internet.
What should you do?

A.
On Computer 1, modify the network settings.

B.
Enable port mirroring on VM1.

C.
Create an external virtual switch and configure VM1 to use the switch.

D.
On VM1, select Enable virtual LAN identification.

Explanation:
http://www.technig.com/connect-hyper-v-machines-to-internet/