A company has its retail business applications running on IBM WebSphere MQ infrastructure across heterogeneous platforms. After a recent failure, the company set up a failover mechanism where a…

A company has its retail business applications running on IBM WebSphere MQ infrastructure across heterogeneous platforms. After a recent failure, the company set up a failover mechanism where a centrally located z/OS server hosts the main application and applications on other servers connect to the main application using distributed queuing. What term best describes this topology?