What are the three principal threats to the security of a system?

What are the three principal threats to the security of a system?
Ans: In any networked system, there are three main types of security threats:
1. Threats to the confidentiality of the system and its data: These can disclose information to people or programs that are not authorized to have access to that information.
2. Threats to the integrity of the system and its data: These threats can damage or corrupt the software or its data.
3. Threats to the availability of the system and its data: These threats can restrict access to the software or its data for authorized users.