Review the exhibit of an explicit proxy policy configuration. If there is a proxy connection attempt coming from the IP address 10.0.1.5, and from a user that has not authenticated yet, what action…

While the user is prompted to authenticate and traffic from the 'Student' user will be allowed by policy #1, the statement in option D is more precise by emphasizing that *only* traffic from that specific user will be allowed by that specific policy in the context of authentication.

The user will be prompted to authenticate because the policy requires it. An unauthenticated user cannot simply be allowed by a policy that has explicit user authentication requirements.

The user will be prompted to authenticate. An unauthenticated user cannot fulfill the requirements of a policy that mandates authentication for a specific user or user group.

When an unauthenticated connection from `10.0.1.5` attempts to match an explicit proxy policy (e.g., policy #1) that specifically requires authentication for a user like 'Student', the FortiGate will initiate an authentication challenge. Only if the user successfully authenticates as 'Student' will the policy be matched and their traffic allowed.