单项选择题 Your company has a main office and four branch offices. The main office contains a server named Server1 that runs Windows Server 2012 R2. The IP configuration of each office is configured as shown in the following table. You need to add a single static route on Server1 to ensure that Server1 can communicate with the hosts on all of the subnets. Which command should you run?（）

单项选择题 Your network contains an Active Directory domain named contoso.com. All servers run Windows Server 2012 R2. The domain contains a server named Server1. You open Review Options in the Active Directory Domain Services Configuration Wizard, and then you click View script. You need to ensure that you can use the script to promote Server1 to a domain controller. Which file extension should you use to save the script?（）

单项选择题 You have a server that runs a Server Core installation of Windows Server 2012 R2. You need to change the DNS server used by IPv6. What should you do?（）