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Fortinet Certified Professional: FortiGate / FortiOS 7.6 Administrator · Fortinet
Select 2 answers.
This question asks for 2 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
B and C, to achieve this configuration (2 vlan interfaces on the same phisical port with same vlanID) you must use 802.1AD vlan protocol (is not mentioned but you must know) and, of course, to have a switch supporting this protocol, but in any case the 2 vlan interfaces MUST be assigned to 2 different VDOMs, to avoid conflict. so B answer is true, answer C is also true as on a single VDOM it's impossible to configure 2 vlan Interfaces with same vlanID, regardless from vlan protocol. Very trichi question ;-)
the firewall will instantly complain about duplicate VLAN ID no matter if you select different VDOMs, IPs, or IPs from the same subnet (which will ADDITIONALLY cause an IP-conflict with the first VLAN interface) So, if the official test has this question and asks for two choices, it's definitely wrong ... (as any sane technician would argue
On other websites, this question only requests a single answer. B and D can be done using a different vlan type,but that's because it's Q in Q tunneling, so it's not really a vlan interface.