Your network contains an Active Directory forest. The forest functional level is Windows
Server 2012 R2. The forest contains a single domain. The domain contains a member server named Server1. Server1 runs windows Server 2012 R2.
You purchase a network scanner named Scanner1 that supports Web Services on Devices(WSD).
You need to share the network scanner on Server1.
Which server role should you install on Server1?（）

Your network contains multiple subnets.
On one of the subnets, you deploy a server named Server1 that runs Windows Server 2012 R2.
You install the DNS Server server role on Server1, and then you create a standard primary zone named contoso.com.
You need to ensure that client computers can resolve single-label names to IP addresses.
What should you do first?（）

Your network contains an Active Directory forest named contoso.com. The forest contains a single domain. The domain contains two domain controllers named DC1 and DC2 that run Windows Server 2012 R2.
The domain contains a user named User1 and a global security group named Group1.
User1 logs on to a client computer named Computer1.
You need to disable the computer account of Computer1.
Which cmdlet should you run?（）

Your network contains an Active Directory domain named contoso.com. All client computer accounts are in an organizational unit (OU) named AllComputers. Client computers run either Windows 7 or Windows 8.
You create a Group Policy object (GPO) named GP1.
You link GP1 to the AllComputers OU.
You need to ensure that GP1 applies only to computers that have more than 8 GB of memory.
What should you configure?（）