You work as an administrator at ABC.com.The ABC.com network consists of a single domain named ABC.com.All servers in the ABC.com domain have Windows Server 2012 R2 installed and all client computers have Windows 8 installed.All client computers are connected to the Internet via an Internet Proxy Server named ABC_SR11.You add the DNS Server role on a server named ABC_SR12 and  make ABC_SR12 the primary DNS server on the client computers.How would you ensure that ABC_SR12 does not perform name resolution of Internet host names for the client computers？（）