Questions no: 9 Verified Answer: B
Comprehensive and Detailed Explanation with all FortiSASE and SD-WAN 7.6 Core Administrator curriculum documents: According to the SD-WAN 7.6 Core Administrator study guide and FortiOS 7.6 Administration Guide, the behavior for deleting an SD-WAN member from the GUI when it is the only member in its zone is governed by the following operational logic:
Reference Checks: Before allowing the deletion of any SD-WAN member, FortiOS performs a " check for dependencies. " If an interface is being used in an active Performance SLA or an SD-WAN Rule, the GUI will typically prevent the deletion or gray out the option until those references are removed. However, the question specifies that this member is no longer used in health-checks or rules.
Zone Integrity: Unlike some other network objects, an SD-WAN zone is permitted to exist without any members. When you delete the final member of a user-defined zone through the GUI, the zone itself remains in the configuration as an empty container.
Route Management: When an SD-WAN member is deleted, any static routes that were specifically tied to that interface ' s membership in the SD-WAN bundle are automatically updated or removed by the FortiGate to prevent routing loops or " black-holing " traffic. This is part of the automated cleanup process handled by the FortiOS management plane.
GUI vs. CLI: In the GUI, the process is streamlined to allow the removal of the member interface. Once the member is deleted, the interface returns to being a " regular " system interface and can be used for standard firewall policies or other functions.
Why other options are incorrect:
Option A: There is no requirement that a zone must contain at least one member; " empty " zones are valid configuration objects in FortiOS 7.6.
Option C: While the deletion is accepted, it is not with " no further action " —the system must still reconcile the routing table and interface status.
Option D: FortiGate does not automatically move deleted members into the default zone (virtual-wan-link). Once deleted, the interface is simply no longer an SD-WAN member.