Final answer:
The top security concerns reported by IT security professionals include data breaches, cyber crimes and cyber attacks, and workforce mobility, but not data backup.
Step-by-step explanation:
The top security concerns reported by IT security professionals include data breaches, cyber crimes and cyber attacks, and workforce mobility. However, the one concern that is not typically reported by IT security professionals is data backup.
Data breaches refer to unauthorized access to sensitive information by hackers, while cyber crimes and cyber attacks involve malicious activities targeting computer systems and networks. Workforce mobility pertains to the challenges and risks associated with employees working remotely or using mobile devices.
While data backup is crucial for safeguarding data and ensuring its availability in case of disasters, it is not usually mentioned as a top security concern by IT security professionals.