Your network contains an Active Directory domain named contoso.com. The network
contains 500 client computers that run Windows 8. All of the client computers connect to
the Internet by using a web proxy.
You deploy a server named Server1 that runs Windows Server 2012 R2. Server1 has the
DNS Server server role installed.
You configure all of the client computers to use Server1 as their primary DNS server.
You need to prevent Server1 from attempting to resolve Internet host names for the client
What should you do on Server1?