By default, which statement is correct when an IEEE 802.1Q trunk port receives an
untagged frame?

A.
The frame is considered in the native VLAN and forwarded to the ports associated with
that VLAN.

B.
The frame is encapsulated and tagged as in the native VLAN.

C.
The frame is broadcast on all ports regardless of VLAN association.

D.
The frame is dropped.

Explanation:
If a switch receives untagged frames on a trunk port, they are assumed to be part of the
VLAN that are designated on the switchport as the native VLAN.