Refer to the exhibit.

The link between switch SW1 and switch SW2 is configured as a trunk, but the trunk failed to
establish connectivity between the switches. Based on the configurations and the error
messages received on the console of SW1, what is the cause of the problem?

A.
The two ends of the trunk have different duplex settings.

B.
The two ends of the trunk have different EtherChannel configurations.

C.
The two ends of the trunk have different native VLAN configurations.

D.
The two ends of the trunk allow different VLANs on the trunk.

Explanation:
The native VLAN, if not explicitly configured, will default to the default VLAN, (VLAN1). The
Native VLAN is configured for an 802.1Q Trunk port. 802.1Q trunks carry traffic from multiple
VLANs by tagging the traffic with VLAN identifiers (Tagged Traffic) which identifies which
packets are associated with which VLANs, and they can also carry non VLAN traffic from
legacy switches or non 802.1Q compliant switches (Untagged Traffic). The switch will place
untagged traffic on the Native VLAN by using a PVID identifier. Native VLAN traffic is not
tagged by the switch. It is a best practice to configure the Native VLAN to be different than
VLAN1 and to configure it on both ends of the trunk.