HOTSPOT
Your network contains an Active Directory domain named contoso.com. The network contains a DHCP server named DHCP1. You add a new network segment to the network. On the new network segment, you deploy a new server named Server1 that runs Windows Server 2012 R2. You need to configure Server1 as a DHCP Relay Agent.
Which server role should you install on Server1? To answer, select the appropriate role in the answer area.
Answer: 
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