Which statement about the VLAN on a Layer 2 switch is true?
A. The CFI in the VLAN tag specifies whether the priority in the VLAN tag is valid.
B. The VLAN tag is located in the Layer 2 header of a packet.
C. The CFI in the VLAN tag contains two bits.
D. A VLAN on the switch is a broadcast domain. The broadcast domains are separated.
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I would say wrong answer.
-> The Canonical Format Indicator (CFI) bit indicates whether the following 12 bits of VLAN identifier conform to Ethernet or not. For Ethernet frames, this bit is always set to 0. (The other possible value, CFI=1, is used for Token Ring LANs, and tagged frames should never be bridged between an Ethernet and Token Ring LAN regardless of the VLAN tag or MAC address.)
While a VLAN tag gets added in the Ethernet Frame of a Layer2 Header by 4 bits.