seleCting teChnology 173
security structure of the Active Directory domain. Naturally, the ser-
vices that support this capability must run on a Microsoft-technology-
based server. is provides a tightly integrated directory product for
Microsoft-directory-committed organizations. A significant advan-
tage of this approach is that Active Directory groups can be used to
grant privileges in the VM system rather than creating an internal set
of roles or user groups. e disadvantage is that you may be commit-
ted to the Active Directory platform.
5.7.2 RADIUS and TACACS+
In a more network-centric environment, RADIUS is a very common
protocol option. It is an old method typically used for dial-in systems.
However, the protocol is no less useful for ...