→Checks the following setup
# ping the other student's VMs 192.168.y.z
* If you can ping 172.16.x.1 but not 172.16.y.1, make sure that your host
and ping the other student's host.
* If you can't ping 172.16.x.1, check your internet network setup.
* If you can ping 172.16.y.1, but not 192.168.y.1, ask/help the other stuent to check his/her intenal network setup.