Which method in FortiGate determines the source of traffic to enforce policies?

The method that determines the source of traffic to enforce policies in FortiGate is Source Identification. This process involves identifying and categorizing incoming traffic based on its source IP address, user authentication, and other defining attributes. By properly identifying the source of traffic, FortiGate can apply the relevant security policies, such as access control lists and firewall rules, ensuring that only authorized traffic is allowed to pass through the network.

The accuracy of Source Identification is vital for effective traffic management and security enforcement. This feature allows administrators to create specific policies that can differentiate between various users, groups, or even devices based on their unique identifiers, thereby enhancing the network’s security posture.

In contrast, Destination NAT is primarily concerned with redirecting incoming traffic to a specific target, which does not inherently manage traffic policy enforcement based on its source. Interface-Based Routing deals with directing packets based on routing tables and interfaces rather than enforcing security policies based on traffic source. Firewall Addressing focuses on defining network addresses for security policies but does not directly involve the identification process of the traffic source. Therefore, the correct choice reflects the essential function of determining traffic origin for policy enforcement.