DCC in OAM 11gR2

I did not get chance to work on OAM 11g R2 yet, but one of my friends were asking couple of weeks ago about DCC in OAM 11g.
DCC stands for Detached Credential Collector which is a new feature introducted in 11gR2, not available in 11gR1.

I've read an article about this feature which looks simpler to me. You can learn this too http://fusionsecurity.blogspot.com/2012/10/dcc-configuration-11gr2.html

Its Oracle Documentation is here.