The success of IIoT (Industrial Internet of Things) depends on the “things” conforming to global standards and specifications. This will ensure the ecosystem of devices and applications work seamlessly and securely with each other. Interoperability testing will ensure that all the “things” or nodes in the connected system adhere to accepted standards and function as expected. One weak or non-compliant node in the system can lead to a less the optimal functioning of the overall system.