Refer to the exhibit.

A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN
2 What causes this behavior?

A.
trunk mode mismatches

B.
allowing only VLAN 2 on the destination

C.
native VLAN mismatches

D.
VLANs that do not correspond to a unique IP subnet

Explanation:

Untagged frames are encapsulated with the native VLAN. In this case, the native VLANs are
different so although S1 will tag it as VLAN 1 it will be received by S2.