NonStop Systems Introduction

The Application Server Environment
NonStop Systems Introduction—527825-001
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Multi-Tiered Architectures
Multi-tiered architectures are commonly used by today’s applications servers, such as
WebLogic Server and NonStop CORBA. These technologies advance the N-tiered
concept a step further by introducing distributed object architectures, in which the
middle tier (business layer) consists of business objects. These business objects, such
as Enterprise JavaBeans, can reside on different nodes in a network. The application
server makes it easy to develop distributed business objects and assemble them into
complete business applications.
Figure 3-4. Client/Server Three-Tiered Structure
Server
Host
computer
Business logic
Client
VST019.vsd
Tier 1 Tier 2
Host
computer
Tier 3
Server
Presentation
Graphical user interface
Client
Data management