How do I ensure that the DNS is being set by the network?
On Windows
I would check here and make sure that Obtain DNS server address automatically
was selected:
Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up.
Sign up to join this communityOpen System Preferences and click the Network icon.
Select your network in the list on the left, and make sure that it says "Using DHCP" in the drop-down list after "Configure IPv4:"
If you've made any changes, click the "Apply" button and then the "Show All" button to make sure everything is saved.