IP Security is a wonderful mechanism to protect data on a possibly insecure physical network. Used correctly, IPSec can protect data in a unique way that is simple and efficient. Its implementation is somewhat complex, as is its configuration through Group Policy. Wizards help with most of the common IPSec configuration tasks, which is a big benefit.
Plan to use IPSec carefully within your organization, remembering the impact IPSec can have on performance. Computers expected to carry a high load of IPSec traffic should be sized accordingly, with faster processors and additional memory. Dedicated IPSec-capable network adapters can also make high-volume IPSec usage more feasible. An Active Directory domain, while not a requirement, is a highly desirable means of centrally configuring your company's computers to use IPSec appropriately.