Computer security refers to the protection of computer systems, networks, and sensitive information from unauthorized access, theft, damage, or disruption. Computer security is essential to ensure the confidentiality, integrity, and availability of data, as well as the functioning of computer systems and networks.
There are several key aspects of computer security, including:
- Authentication: Ensuring that individuals are who they claim to be and verifying their identity through passwords, biometrics, or other means.
- Authorization: Controlling access to resources based on an individual’s identity, role, or permissions.
- Encryption: Protecting data by converting it into a code that can only be read with a specific key or password.
- Firewall: A network security system that monitors and controls incoming and outgoing traffic to prevent unauthorized access.
- Malware protection: The use of software to detect, prevent, and remove malicious software, such as viruses, spyware, and ransomware.
- Security patches and updates: Regularly updating software and systems to patch security vulnerabilities and protect against new threats.
- Physical security: Protecting computer systems and data physically through access controls, environmental controls, and backup and recovery plans.
- Training and awareness: Educating users about computer security best practices and the potential risks of cyber threats.
Effective computer security requires a layered approach that addresses multiple aspects of security and involves the cooperation and awareness of all users.
Here are some MCQ’s on computer security:
1. What is the definition of computer security?
a. The practice of protecting computers and other digital devices from unauthorized access or attacks.
b. The process of developing software for computers.
c. The process of making computers faster.
d. None of the above.
2. What is a computer virus?
a. A malicious software program that can replicate itself and spread from one computer to another.
b. A type of computer hardware.
c. A type of computer peripheral device.
d. A type of computer software that helps improve performance.
3. What is a firewall?
a. A security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
b. A type of computer software that helps improve performance.
c. A type of computer peripheral device.
d. A type of computer hardware.
4. What is encryption?
a. The process of converting plain text into a coded message to prevent unauthorized access.
b. The process of developing software for computers.
c. The process of making computers faster.
d. None of the above.
5. What is authentication?
a. The process of verifying the identity of a user, device or application.
b. The process of developing software for computers.
c. The process of making computers faster.
d. None of the above.
6. What is the difference between authentication and authorization?
a. Authentication verifies the identity of a user, while authorization determines what actions the user is allowed to perform.
b. Authentication verifies the identity of a device, while authorization determines what actions the device is allowed to perform.
c. Authentication verifies the identity of an application, while authorization determines what actions the application is allowed to perform.
d. None of the above.
7. What is a phishing attack?
a. A type of attack in which an attacker sends a fake email or message to a victim in order to trick them into giving away sensitive information.
b. A type of attack in which an attacker physically breaks into a building in order to steal data.
c. A type of attack in which an attacker uses a software program to gain unauthorized access to a computer system.
d. None of the above.
8. What is a denial of service (DoS) attack?
a. A type of attack in which an attacker floods a network or website with traffic in order to make it unavailable to users.
b. A type of attack in which an attacker physically steals data from a computer system.
c. A type of attack in which an attacker uses a software program to gain unauthorized access to a computer system.
d. None of the above.
9. What is a brute force attack?
a. A type of attack in which an attacker uses a software program to try every possible password combination until the correct one is found.
b. A type of attack in which an attacker sends a fake email or message to a victim in order to trick them into giving away sensitive information.
c. A type of attack in which an attacker physically breaks into a building in order to steal data.
d. None of the above.
10. What is a Trojan horse?
a. A type of malware that appears to be legitimate software but performs malicious actions.
b. A type of computer hardware.
c. A type of computer peripheral device.
d. None of the above.
