A network engineer is explaining 802.1Q tagging to a junior administrator. The engineer shows a frame that has a 4-byte tag inserted between the source MAC address and the EtherType field. What is the purpose of this 4-byte tag?

To indicate the frame's source port

To identify which VLAN the frame belongs to

To prioritize the frame for QoS

What is the native VLAN on a trunk port?

The VLAN that is automatically created on every switch.

The VLAN that is used for all management traffic on the switch.

The VLAN with the highest priority in the 802.1Q tag.

The VLAN that carries untagged traffic on a trunk port.

A BIG-IP is connected to a switch via a trunk. The switch's native VLAN is VLAN 5. The BIG-IP is configured with VLAN 5 as untagged and VLAN 10 as tagged. A packet arrives at the BIG-IP with no 802.1Q tag. Which VLAN will the BIG-IP associate this packet with?

The packet will be assigned to a random VLAN

Where is the IEEE 802.1Q VLAN tag inserted in an Ethernet frame?

After the source MAC address and before the EtherType/Length field

After the destination MAC address and before the source MAC address

After the EtherType/Length field and before the payload

At the end of the frame, after the payload and before the FCS

F5Certified Administrator, BIG-IP (F5-CA, BIG-IP)

Domain 1Objective 4

Distinguish Between Tagged vs Untagged VLAN F5CAB2 Practice Questions (Page 1)

Part of the Explain the relationship between interfaces, trunks, VLANs, self-IPs, routes and their status/statistics domain, which makes up ~23% of our current practice bank. F5 does not publish an official question count, but from its 30-minute exam (~10–20 total, ~2–5 in this domain), expect 1–1 from this objective — we provide 12 practice questions to prepare you well beyond it. (estimate)

12questions here

3free pages

5concepts

Questions 1–5

1application · medium
A network engineer is explaining 802.1Q tagging to a junior administrator. The engineer shows a frame that has a 4-byte tag inserted between the source MAC address and the EtherType field. What is the purpose of this 4-byte tag?
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2foundation · easy
What is the native VLAN on a trunk port?
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3foundation · easy
What is the size of the IEEE 802.1Q VLAN tag that is inserted into an Ethernet frame?
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4expert · medium
A BIG-IP is connected to a switch via a trunk. The switch's native VLAN is VLAN 5. The BIG-IP is configured with VLAN 5 as untagged and VLAN 10 as tagged. A packet arrives at the BIG-IP with no 802.1Q tag. Which VLAN will the BIG-IP associate this packet with?
Select an answer first
5foundation · easy
Where is the IEEE 802.1Q VLAN tag inserted in an Ethernet frame?
Select an answer first

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