How can firewalls enhance web security?

Firewalls enhance web security primarily by filtering traffic based on security rules. This filtration process acts as a barrier between trusted internal networks and untrusted external networks, such as the internet. Firewalls analyze incoming and outgoing traffic and determine whether to allow or block specific data packets based on predetermined security policies.

By implementing these rules, firewalls can prevent unauthorized access to network resources and safeguard sensitive data. They can block harmful traffic that may carry malicious content or attempts to exploit vulnerabilities, thus reducing the risk of attacks on the network. This proactive filtering capability helps maintain the integrity of the network and ensures that only legitimate traffic is permitted, enhancing overall web security.

The other options do not align with the fundamental role of firewalls in network protection and security management. While they may mention aspects related to security, they do not reflect the primary function of firewalls in enforcing access controls and monitoring traffic to protect against potential threats.