Go back to 350-030 - CCIE Voice Written Exam

Question :-

Which of the following is true about the 802.1q frame header?
In an Ethernet frame after the source address, 6 bytes 802.1Q header is included, which contains 32 bits for the tag protocol ID, 3 bits for the priority field, 1 bit for the canonical field (always 0), and 12 bits for the VLAN identifier.
In Ethernet frame after the source address, 4 bytes 802.1Q header is included, which contains 16 bits for the tag protocol ID, 3 bits for the priority field, 1 bit for the canonical field (always 0), and 12 bits for the VLAN identifier.
802.1q frame is inserted at the beginning of Ethernet frame. Size of 802.1q frame is 4 bytes.
802.1q frame is inserted inside the actual Ethernet frame. In other words, it is inserted after Source Address in the Ethernet frame. Size of 802.1q frame is 26 bytes.

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