Windows Server 2012 R2 Administrator Cookbook

Enabling Network Load Balancing (NLB) on your DirectAccess servers

DirectAccess is designed so that you always get a single server environment up and running first, before you start tinkering with arrays or load balancing. This way you can validate that all of the environmental factors are in place and working, and that you can successfully build DirectAccess tunnels from your client computers before introducing any further complexity into the design. Once established, however, it is a common next step to take a look at turning up another new server and creating some redundancy for your new remote access solution.

While joining two similar servers together to share load is commonly called clustering and sometimes I hear admins refer to it as such ...