How VTP Advertisements Are Delivered

B

VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol that enables switches to share VLAN information with each other. This information includes VLAN names, IDs, and other attributes. When a switch receives an update from another switch, it will update its own VLAN database accordingly.

VTP advertisements are used by switches to communicate information about VLANs across the network. These advertisements are sent out periodically by VTP servers and propagated to all VTP clients within the same VTP domain.

The VTP advertisements are sent using multicast frames, specifically destination MAC address 01-00-0C-CC-CC-CC, which is a reserved multicast address for VTP. When a switch receives a VTP advertisement, it checks the version number, domain name, and revision number to determine whether to update its own VLAN database.

It is worth noting that VTP does not forward VTP advertisements across Layer 3 boundaries. Therefore, VTP servers and clients must be directly connected or connected through a Layer 2 switch to participate in the same VTP domain.

In conclusion, the answer to the question is B. VTP advertisements are delivered to switches across the network using multicast frames.