Your company has a main office and a branch office. The main office has a domain controller named DC1 that hosts a DNS primary zone. The branc office has a DNS server named SRV1 that hosts a DNS secondary Zone. All client computers are configured to use their local server for DNS resolution. You change the IP address of an existing server named SRV2 in the main office. You need to ensure that SRV1 reflects the change immediately. What should you do？（） 

YourcompanyhasanActiveDirectorydomainnamedad.contoso.co...

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

Yourcompanyhasasingleactivedirectoryforestthathasanacti...

单项选择题Your company has a single active directory forest that has an active directory domain named na.contoso.com zone. you have enabled DNS scavenging on Server1. Three weeks later， you notice that the stale resource records remain in na.contoso.com. You need to ensure that the stale resource records are removed from na.contoso.com. What should you do？ （）