Q: Where in an ethernet frame will you find a Virtual Local Area Network (VLAN) header?
or
Q: Where is the Virtual Local Area Network (VLAN) header located in an Ethernet frame?
- Before the EtherType field
- Frame Check Sequence
- Preamble
- Payload
Explanation: The 802.1Q tag of an Ethernet packet is normally where the information on the Virtual Local Area Network (VLAN) header may be located. To determine which VLAN the Ethernet frame belongs to, an 802.1Q tag is appended to the frame before it is sent across the network. Within the Ethernet frame, it is inserted in the gap that exists between the source MAC address and the EtherType/length field.
The frame contains information such as the VLAN ID, which is included inside the VLAN header. This VLAN ID identifies the particular VLAN to which the frame belongs. Because of the availability of the VLAN tag, it is possible to divide a network into many different virtual LANs, each of which may have its own VLAN ID. This results in an improvement in the network’s structure and administration.
