Which option describes how a VTPv3 device responds when it detects a VTPv2 device on a trunk
port?
A.
It sends VTPv3 packets only.
B.
It sends VTPv2 packets only.
C.
It sends VTPv3 and VTPv2 packets.
D.
It sends a special packet that contains VTPv3 and VTPv2 packet information.
When a VTP version 3 device on a trunk port receives messages from a VTP version 2 device, the
VTP version 3 device sends a scaled-down version of the VLAN database on that particular trunk
in a VTP version 2 format. A VTP version 3 device does not send out VTP version 2-formatted
packets on a trunk port unless it first receives VTP version 2 packets on that trunk. If the VTP
version 3 device does not receive VTP version 2 packets for an interval of time on the trunk port,
the VTP version 3 device stops transmitting VTP version 2 packets on that trunk port.
Even when a VTP version 3 device detects a VTP version 2 device on a trunk port, the VTP
version 3 device continues to send VTP version 3 packets in addition to VTP version 3 device 2
packets, to allow two kinds of neighbors to coexist on the trunk. VTP version 3 sends VTP version
3 and VTP version 2 updates on VTP version 2-detected trunks.
Reference. http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-
2SX/configuration/guide/book/vtp.html