Direct Access is a remote access technology in Windows Server 2012 that provides seamless, always-on corporate network connectivity for managed Windows clients. It allows bi-directional communication over IPv6 so when clients have internet access, they are automatically connected to the corporate network without needing to dial or connect. Windows Server 2012 improved Direct Access by simplifying deployment, allowing it to be combined with RRAS VPN, and enhancing performance and scalability. Direct Access uses various technologies like IPv6, IPsec, Active Directory, and certificates to provide transparent connectivity to managed Windows 8 and higher clients.