How do firewalls and intrusion detection systems (IDS) complement each other?

Firewalls and intrusion detection systems (IDS) work together to enhance network security, and their complementary functions are demonstrated well in the correct choice. Firewalls serve as the first line of defense by filtering incoming and outgoing network traffic based on predetermined security rules. They block unauthorized access attempts, which is crucial for protecting sensitive data and preventing potential attacks from external threats.

On the other hand, intrusion detection systems provide a deeper layer of security by constantly monitoring network traffic and system activities for signs of potential security breaches or unusual behavior. By detecting and alerting on suspicious activities, IDS can identify threats that may have bypassed the firewall or originated from within the network itself. This combination allows organizations to manage not only external threats but also internal vulnerabilities, creating a more robust security posture.

The other options do not accurately represent how firewalls and IDS function together. For instance, the claim that firewalls enhance speed of data transfer misrepresents their purpose, which is primarily security-focused. The notion that firewalls provide data storage or that IDS are solely software-based also diverges from the realities of how these security systems are implemented and function within a network environment.