Which two of these are characteristics of the 802.1Q protocol? (Choose two.)
A. It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
B. It is a trunking protocol capable of carrying untagged frames.
C. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
D. It includes an 8-bit field which specifies the priority of a frame.
Answer: B,C