_____________ is guarded by firewalls.Select one:virus attacksdata driven attacksUnauthorized accessfire attacks

The correct answer is Unauthorized access.

Explanation:

Firewalls are crucial security systems placed between a trusted internal network and untrusted external networks, such as the internet. Their primary purpose is to monitor and control incoming and outgoing network traffic based on predetermined security rules. Firewalls help to prevent unauthorized access to or from a private network.

1. Virus Attacks: These are malicious software that can infect systems, but firewalls primarily protect against unauthorized access rather than detecting or eliminating viruses.
2. Data Driven Attacks: While this term is broad, it usually refers to various strategies attackers employ based on data inputs, which firewalls may not specifically guard against.
3. Unauthorized Access: This is exactly what firewalls are designed to prevent—unauthorized users attempting to access network resources, making it the best answer.
4. Fire Attacks: This term is vague and not typically used to refer to any recognized threat against network security.

In summary, firewalls primarily guard against unauthorized access, ensuring that only permitted users can enter the network, thus maintaining the security and integrity of the system.