Your network contains a Hyper-V host named Hyperv1 that runs Windows Server 2012 R2.
Hyperv1 has a virtual switch named Switch1.
You replace all of the network adapters on Hyperv1 with new network adapters that support single-root I/O virtualization (SR-IOV). You need to enable SR-IOV for all of the virtual machines on Hyperv1.
Which two actions should you perform?（）

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