Questions about Sun's SL-425 Course

[True Grit]

Has anyone taken SL-425 Architecting and Designing J2EE Applications?

I was examining the course content at
http://suned.sun.com/US/catalog/courses/SL-425.html and I am not entirely
sure what is meant by the following topics:

Module 5: Optimizing Inside the Tier
-Specify service providers to support maintenance goals

Module 6: Optimizing Tier-to-Tier Communication
-Create a network model for an application
-Construct a data and call model to efficiently submit service requests and
receive responses

Module 7: Analyzing Quality-of-Service Requirements
-Evaluate the effects of dimensions on systemic qualities

Module 11: J2EE Technology Choices
-Design for long-term application state

Any advice would be appreciated.

Thanks.