单项选择题 Your company has an active directory domain named ad.contoso.com. the company also has a public namespace named contoso.com. you need to ensure that public DNS zone records cannot be copied. You must achieve this goal without impacting the functionality of public DNS name resolutions. What should you do?（）

单项选择题 You perform a security audit on a server named server1. You install the Microsoft network monitor 3.0 application on server1. You find that only some of the captured frames dsplay host mnemonic names in the source column and the destination column. All other frames display ip addresses. You need to display mnemonic host names instead of ip addresses for all the frames what should you do?（）

单项选择题 Your network contains an Active Directory domain.The domain contains a member server named Server1. Server1 has a single network connection.You need to log every attempt to connect to Server1 on a restricted port.What should you do？（）