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NSE 6 – LAN Edge 7.6 Architect Exam Materials - Question #19 Discussion

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What is the primary purpose of configuring an untagged VLAN on a FortiSwitch port in a network deployment? (Choose one answer)

  • A. To enable features like quarantine MAC or dynamic VLAN assignment.
  • B. To carry multiple VLANs on a single port.
  • C. To enable QoS (quality of service) on the port.
  • D. To automatically tag traffic from connected devices.
Correct Answer: A

Brave-Dump Community Votes

Answer: D (2 votes) 50%
Answer: A (2 votes) 50%

Community Explanations & Comments (4)

Jose Antonio 11 months ago
Selected: D
This is the correct answer because when a port is configured with an untagged VLAN, it assumes all traffic received on that port belongs to that specific VLAN and will transmit it without a tag on that port's configuration.
Mohamed Fetouh Mohamed 11 months ago
Untagged VLANs: Defines VLANs for which egress traffic is sent untagged. This setting is mainly used for specific features, such as quarantine MAC or dynamic VLAN assignment. The untagged VLAN must be part of the allowed VLAN list for it to be effective. Page 127 of the guide LAN Edge 7.6, Correct Answer is A
Anonymous User 7 months ago
Selected: A
Study Guide p. 127
Anonymous User 6 months ago
Selected: A
The documentation on page 127 confirm that option A is correct.
Anonymous User 4 months ago
Selected: D
Answer D
Untagged VLAN (Native VLAN): If packets arriving at a FortiSwitch port do not have any VLAN tag (such as traffic originating from computers, printers, or standard end-user devices), the switch assigns this traffic to the "Untagged VLAN" configured on that port. In other words, it automatically applies that specific VLAN tag to the incoming untagged traffic and forwards it within the switch fabric accordingly. When sending traffic back to the connected device, it strips the tag off (untagged) before delivery.

Tagged VLANs (Allowed VLANs): If traffic from multiple networks needs to pass through a single port (such as deployments involving an IP phone + PC combination or Access Points), tagged VLANs ensure that these distinct traffic streams are carried with their respective VLAN tags intact.