Which device actively blocks threats in real-time by analyzing network traffic?

The device that actively blocks threats in real-time by analyzing network traffic is typically the Intrusion Prevention System (IPS). An IPS functions by monitoring network traffic for suspicious activity, and unlike an Intrusion Detection System (IDS), which only identifies and alerts on potential threats without taking action, an IPS is designed to take proactive measures. This includes blocking or rejecting malicious data packets and preventing attacks from succeeding in real-time.

This capability is crucial for maintaining network security, as it allows organizations to respond immediately to threats, thereby reducing the potential for damage. The IPS leverages predefined rules and heuristic analysis to detect and mitigate threats as they occur, ensuring a layer of protection against various cyberattacks.

In contrast, while firewalls are essential for controlling traffic based on security rules, they primarily focus on allowing or denying access, rather than analyzing traffic for malicious intent in real-time. A router is primarily responsible for directing data packets between networks and does not offer active threat protection. An IDS, while capable of monitoring and alerting on potential threats, does not take direct actions to block them, making it different from an IPS.