单项选择题
A.Configure a root zone on the external DNS server.
B.Configure a stub zone for.com on the external dns server.
C.Configure the external DNS server to use the default root hints.
D.Configure the External DNS server to use the ISP'S DNS server as a forwarder.
多项选择题 YouaredesigningastrategytoallowinternalusersinDallastoresolvedomainnames.Whatarethreepossiblewaystoachievethegoal?（）
单项选择题 YouaredesigningastrategytoallowuserstogainVPNaccesstotheinternalnetwork.Whatshouldyoudo?（）
单项选择题 YouaredesigningtheDNSnameresolutionstrategyfortheinternalnetwork.Whatshouldyoudo?（）