Which server role should you install on Server1?

Explanation/Reference:
Explanation:
If you opt to create a centralized or hybrid DHCP infrastructure, you will need a DHCP relay agent on every subnet that does not have a DHCP server on it. Many routers are capable of functioning as DHCP relay agents, but in situations where they are not, you can configure a Windows Server 2012 computer to function as a relay agent.
In Windows Server 2012 R2 the DirectAccess feature and the RRAS role service were combined into a new unified server role. This new Remote Access server role allows for centralized administration, configuration, and monitoring of both DirectAccess and VPN-based remote access services. Additionally, Windows Server 2012 R2 DirectAccess provided multiple updates and improvements to address deployment blockers and provide simplified management.
References:
http://technet.microsoft.com/library/hh831416
http://technet.microsoft.com/en-us/library/cc732263.aspx