How many bytes are added to each frame as a result of the configuration?

Refer to the exhibit.

How many bytes are added to each frame as a result of the configuration?
A . 4-bytes except the native VLAN
B . 8-bytes except the native VLAN
C . 4-bytes including native VLAN
D . 8-bytes including native VLAN

Answer: A

Explanation:

In 802.1Q trunking, all VLAN packets are tagged on the trunk link, except the native VLAN. A VLAN tag adds 4 bytes to the frame. Two bytes are used for the tag protocol identifier (TPID), the other two bytes for tag control information (TCI).