What is the role of a firewall in network security?

• A. To provide wireless connectivity
• B. To monitor and control network traffic
• C. To manage user passwords
• D. To enhance website performance

Answer: (B)

The role of a firewall in network security primarily involves monitoring and controlling network traffic. Firewalls serve as a barrier between a trusted internal network and untrusted external networks, such as the internet. They analyze incoming and outgoing traffic based on predetermined security rules, allowing or blocking data packets according to the organization's security policies. This process helps prevent unauthorized access to the network and protects sensitive information from potential threats, like hackers or malware.

In contrast, other choices do not accurately represent the primary function of firewalls. Providing wireless connectivity pertains more to access points or wireless routers, managing user passwords involves authentication processes not directly related to firewalls, and enhancing website performance is typically associated with content delivery networks or optimization techniques rather than the firewall's primary purpose.