This illustration shows a box at the top center labeled "Oracle HTTP Server." Beneath it and to either side are two larger boxes, each one representing an Oracle Application Server instance; they are labeled "OracleAS Instance 1" and "OracleAS Instance 2", respectively. Within each instance, there are two smaller boxes labeled "OC4J Instance Home 1" and "OC4J Instance Home 2", respectively. Each OC4J Home instance contains three boxes labeled "JMS Server," "Application", and "myQueue". There are two-sided arrows going from the "JMS Server" box to both the "myQueue" and "Application" boxes in each OC4J Home instance. Additionally, there are four arrows with dashed lines going from the "Oracle HTTP Server" box to each of the OC4J Home instances.