The correct answer is D. Access-control software.
Access-control software is a type of computer security software that restricts access to computer systems and data. It is used to control who has access to what information, and to what extent they have access to it. Access-control software can be used to restrict access to individual files, folders, or entire computer systems. It can also be used to control access to specific features or functions within a computer system.
Access-control software is typically implemented using a combination of user authentication and authorization mechanisms. User authentication is the process of verifying the identity of a user. This is typically done by requiring the user to provide a username and password. Authorization is the process of determining whether a user is allowed to access a particular resource. This is typically done by checking the user’s permissions against a set of access control rules.
Access-control software is an essential tool for protecting computer systems and data. It can help to prevent unauthorized access, which can lead to data breaches, identity theft, and other security incidents.
Here is a brief explanation of each option:
- A. User log in is a process that allows users to access a computer system by providing a username and password. User log in is not a security mechanism in itself, but it is often used in conjunction with other security mechanisms, such as access-control software, to restrict access to computer systems.
- B. Passwords are a type of secret information that is used to authenticate users. Passwords are typically used in conjunction with user log in to restrict access to computer systems. Passwords should be strong and unique, and they should be changed regularly.
- C. Computer keys are physical devices that are used to authenticate users. Computer keys are typically used in conjunction with user log in to restrict access to computer systems. Computer keys should be kept secure, and they should be changed regularly.
- D. Access-control software is a type of computer security software that restricts access to computer systems and data. It is used to control who has access to what information, and to what extent they have access to it. Access-control software can be used to restrict access to individual files, folders, or entire computer systems. It can also be used to control access to specific features or functions within a computer system.