End-to-End e-business Transaction Management Made Easy

Chapter 1. Transaction management imperatives 21

1.3.2 Architecting e-business application infrastructures

In a typical e-business environment, the application infrastructure consists of

three separate tiers, and the communication between these is restricted, as

Figure 1-6 shows.

Figure 1-6 A typical e-business application infrastructure

The tiers are typically:

Demilitarized Zone The tier accessible by all external users of the applications.

This tier functions as the gatekeeper to the entire system,

and functions such as access control and intrusion

detection are enforced here. The only other part of the

intra-company network that the DMZ can ...