This TruthValue setting indicates whether a specific application (such as a particular service or listening port) on a backend real server is operational, which is more granular than extremeSlbRealServerUp since a server can be up while one of its applications on it has failed. An administrator or health-check integration sets this to false to stop the load balancer sending traffic destined for that one application, while the load balancer can still send traffic for the server's other, still-healthy applications. For example, if a server's database service crashes but its web service is fine, only the database application's entry would be set to false, leaving web traffic flowing normally.