IT security is the process of protecting electronic information from unauthorized access. It includes both the physical security of devices and the logical security of data and systems. It is important to protect all aspects of IT services, from individual devices to networks and data centre infrastructure. IT security has many threats, including viruses, worms, spyware, and malware. Malicious hackers can also exploit vulnerabilities to gain access to systems and data. Organizations must deploy comprehensive IT security solutions to counter these threats, including preventive and detective controls.