What is a key feature of FortiGate's firewall?

Deep packet inspection is a key feature of FortiGate's firewall, as it allows for a thorough analysis of network traffic beyond just examining the header information. This capability enables the firewall to inspect the actual data packets being transmitted, identifying and blocking potential threats, such as malware and intrusions, that could be concealed within legitimate traffic.

This granular level of inspection enhances security by allowing the firewall to apply policies based on the content of the packets, rather than just source and destination IP addresses or ports. As a result, FortiGate can provide advanced threat protection and ensure that malicious content does not pass through to the internal network.

While the other options involve important functions of network security, they do not encapsulate the advanced capabilities provided by deep packet inspection. For instance, traffic redirection can be part of a firewall's capability but is not as comprehensive in threat detection and mitigation. IP address logging is useful for monitoring traffic patterns but lacks the depth of analysis provided by deep packet inspection. Simple access control lists serve fundamental network management purposes but do not offer the same level of security insight that FortiGate's deep packet inspection feature provides.