IBM WebSphere Application Server V8.5.5 and V9.0 Core Administration — Question 4

In a test environment, a system administrator has configured an external HTTP server in the DMZ that is routing to a cluster of application servers. The administrator wants to achieve higher performance when routing and prioritizing incoming requests to the back-end cluster.
How can the system administrator achieve this task?

Answer options

• A. Configure a cluster of external HTTP servers.
• B. Enable the prefer local option on the cluster members.
• C. Set up a Caching Proxy server between the external web server and the application server.
• D. Place an On Demand Router (ODR) between the external web server and the application servers.

Correct answer: D

Explanation

The correct answer is D because an On Demand Router (ODR) efficiently manages the routing of requests to the appropriate application servers, optimizing performance. Option A does not directly enhance routing efficiency, while option B is irrelevant to the performance needs in this context. Option C, while useful for caching, does not address the prioritization of requests like an ODR does.