In Windows Server 2012 R2, the Remote Access server role is a logical grouping of the following related network access technologies, which are the role services of the Remote Access server role.
In Windows Server 2012, the Remote Access server role includes DirectAccess and RRAS and allows for centralized administration, configuration, and monitoring of DirectAccess, Routing, and VPN-based remote access services.
In Windows Server 2008, Windows Server 2003, and Windows 2000 Server, RRAS provides dial-up, VPN, network address translator (NAT), and routing services.
Windows Server 2012 R2 and Windows Server 2012 Resources
Networking at a Glance