Which Protocol Supports Sharing the VLAN Configuration Between Two or More Switches?

C

"VTP allows a network manager to configure a switch so that it will propagate VLAN configurations to other switches in the network"

VTP minimizes misconfigurations and configuration inconsistencies that can cause problems, such as duplicate VLAN names or incorrect VLAN-type specifications. VTP helps you simplify management of the VLAN database across multiple switches. VTP is a Cisco-proprietary protocol and is available on most of the Cisco switches.

The protocol that supports sharing the VLAN configuration between two or more switches is the VLAN Trunking Protocol (VTP), which is answer C.

VTP is a Cisco proprietary protocol that allows for the automatic propagation of VLAN configuration information throughout a switched network. VTP works by allowing one switch to act as a VTP server, which maintains a database of all VLANs configured on the network, and propagates this information to other switches in the network. VTP clients receive this information and use it to create VLANs and add ports to the appropriate VLANs.

VTP operates over Layer 2 trunk links using Ethernet frames. When a VTP server makes a change to the VLAN configuration, it sends out a VTP update message, which includes the new VLAN information as well as a revision number. VTP clients compare the revision number of incoming updates to their own revision number to determine if the update is more recent. If it is, the client updates its own VLAN database with the new information.

One important consideration when using VTP is to ensure that the VTP domain name is configured consistently across all switches in the network. This ensures that switches can properly communicate and synchronize their VLAN configurations.

Multicast (answer A) is a method of transmitting data to multiple devices simultaneously using a single transmission. It is used in many networking protocols, including VTP.

Spanning Tree Protocol (STP) (answer B) is a Layer 2 protocol used to prevent loops in a network by selectively blocking certain switch ports.

Split-horizon (answer D) is a technique used in some routing protocols to prevent routing loops by preventing a route learned on one interface from being advertised back out the same interface.