A firewall is a program that monitors information coming into a computer.
Here's why:
1. A virus is a type of malicious software that can replicate itself and spread to other computers. It is not a program that monitors information but rather seeks to damage or disrupt computer systems.
2. A cookie is a small piece of data stored on a user's computer by a web browser while the user is browsing a website. Cookies are used to remember user data or track user behavior but do not monitor information coming into a computer.
3. An IP address is a numerical label assigned to each device connected to a computer network. It is not a program but rather an identifier used for communication between devices on a network.
Therefore, a firewall is the correct answer as it is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Firewalls act as a barrier between a trusted internal network and untrusted external networks, filtering and blocking potentially harmful data packets from entering the system.
