What is a “firewall” in cybersecurity?
a) A security system that monitors and controls incoming and outgoing network traffic
b) A tool for encrypting data
c) A virus detection program
d) A method for compressing files
Answer:
a) A security system that monitors and controls incoming and outgoing network traffic
Explanation:
A firewall is a network security device or software designed to monitor and control incoming and outgoing traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks like the internet.
Firewalls help prevent unauthorized access, malware, and cyberattacks by filtering network traffic. They inspect data packets and decide whether to allow or block them based on security policies configured by network administrators.
Firewalls are essential for maintaining the security and integrity of computer systems and networks, protecting them from external threats while allowing legitimate traffic to pass through.