单项选择题 You have a DNS server named DNS1 that runs windows server 2012 R2. DNS1 is used to resolve the names of internet resources by using several DNS forwarders. You need to prevent DNS1 from performing iterative queries if the DNS forwarders are unable to reslove the queries. Which cmdlet should you use?（）

单项选择题 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, including domain controllers, have Windows Server 2012 R2 installed. You have installed the DNS Server Role on an ABC.com server, named ABC-SR13. ABC.com’s workstations make use of a web proxy to access the Internet, and refer to ABC-SR13 as a primary DNS server. You have been instructed to make sure that Internet host names for ABC.com’s workstations are not resolved by ABC-SR13. Which of the following actions should you take?（）

多项选择题 You work as an administrator at Contoso.com. The Contoso.com network consists of a single domain named Contoso.com. All servers on the Contoso.com network have Windows Server 2012 R2 installed. You have been instructed to make sure that a server, named ENSUREPASS-SR07, is configured to be managed remotely from ENSUREPASSSR01 using Server Manager. Which of the following is not a valid option to take?（）