EBS Services in Oracle Apps R12 - Note

1) When you select Root services, Web Services are automatically selected i.e. First three Services Root, Web Entry Point and Web Application Services can only be enabled or disabled together.
          If you want Web Entry Point Services, Web Application Services, and Root Services to be installed on different nodes then use autoconfig after installation.

2. In R12 with introduction of Services there is NO concept of Forms node or Web Node.

3. With default installation all services Root, Web Entry Point, Web Application Services, Batch Processing and Other services are enabled.

References 

?406558.1 Configuring Applications Node Services in Oracle Applications Release 12 (Metalink Note)
?Chapter 2, Page 59-61 of R12 Installation Guide
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