US Patent 8239520 Network service operational status monitoring

Network service operational status monitoring methods and apparatus are disclosed. Responsive to a service status request associated with a network service, an operational status of the network service is determined by an intermediary between a service status requester and the network service. The operational status is a service-specific operational status of the network service in some embodiments. Operational status may be determined through a multi-level procedure in which subsequent levels after a first level of the multi-level procedure are or are not performed depending on a result of a preceding level of the procedure. A multi-level procedure may involve a service connectivity check and a service operational check, for instance.