You have an Active Directoryintegrated domain named. csmtech.local, with two DCs that are DNS servers. You also have an Internet presence with its own domain name, smpub.com, and a DNS server that's not part of an Active Directory domain. You want the DCs to be able to resolve the names of csmpub.com resources and to act as backup for the csmpub.com DNS database. What can you do to achieve these goals?