ArcGIS Server Enterprise - 3 tier setup

[philippschnetzer]

If I was going to setup a multiple server infrastructure (database server, web server, and a couple of "SOC" machines) on 10.1 do I need Enterprise Advanced or will Enterprise Standard suffice?  Also, this multiple server scenario is not possible on Workgroup licence, correct?

[LeoDonahue]

The concept of SOM and SOC does not exist at version 10.1.

What's new:  http://resources.arcgis.com/en/help/main/10.1/0154/015400000310000000.htm
Deployment scenarios: http://resources.arcgis.com/en/help/main/10.1/0154/015400000488000000.htm

[philippschnetzer]

Thanks.  My findings:  Enterprise is needed to setup a multiple server environment running on a fully functional RDBMS.  Workgroup components must all be installed on the same machine.