What is the main purpose of firewalls in network security?

• A. To increase internet speed
• B. To create a backup of data
• C. To monitor and control incoming and outgoing network traffic
• D. To update software applications

Answer: (C)

The main purpose of firewalls in network security is to monitor and control incoming and outgoing network traffic. Firewalls serve as a barrier between a trusted internal network and untrusted external networks, such as the internet. They enforce security policies by allowing or blocking data packets based on predetermined rules. This functionality helps to prevent unauthorized access to or from a private network and can protect against various cyber threats, such as malware and hacking attempts.

While other options mentioned—like increasing internet speed, creating a backup of data, and updating software applications—are important aspects of IT management, they do not pertain to the fundamental role of firewalls. Firewalls specifically focus on traffic management to safeguard network integrity and data confidentiality, making them crucial components in an organization's cybersecurity strategy.