312 WebSphere Application Server V8.5 Concepts, Planning, and Design Guide
10.5.2 DMZ proxy servers
As with HTTP servers, you can use an IP sprayer component to run load balancing and
workload management for incoming web traffic. In addition, the DMZ proxy server provides
workload management capabilities for applications that are running in an application server.
10.5.3 Application servers
In WebSphere Application Server, workload management is achieved by sharing requests
across one or more application servers, each running a copy of the application. In more
complex topologies, workload management is embedded in load balancing technologies that
can be used in front of web servers.
Workload management is a WebSphere Application Server facility ...