Which three options are features of VTP version 3? (Choose three.)

A.
VTPv3 supports 8K VLANs.

B.
VTPv3 supports private VLAN mapping.

C.
VTPv3 allows for domain discovery.

D.
VTPv3 uses a primary server concept to avoid configuration revision issues.

E.
VTPv3 is not compatible with VTPv1 or VTPv2.

F.
VTPv3 has a hidden password option.

Explanation:
Key Benefits of VTP Version 3
Much work has gone into improving the usability of VTP version 3 in three major areas:
The new version of VTP offers better administrative control over which device is allowed to update
other devices’ view of the VLAN topology. The chance of unintended and disruptive changes is
significantly reduced, and availability is increased. The reduced risk of unintended changes will
ease the change process and help speed deployment.
Functionality for the VLAN environment has been significantly expanded. Two enhancements are
most beneficial for today’s networks:
– In addition to supporting the earlier ISL VLAN range from 1 to 1001, the new version supports
the whole IEEE 802.1Q VLAN range up to 4095.
– In addition to supporting the concept of normal VLANs, VTP version 3 can transfer information
regarding Private VLAN (PVLAN) structures.
The third area of major improvement is support for databases other than VLAN (for example,
MST).
Brief Background on VTP Version 1 and VTP Version 2
VTP version 1 was developed when only 1k VLANs where available for configuration. A tight
internal coupling of the VLAN implementation, the VLAN pruning feature, and the VTP function
itself offered an efficient means of implementation. It has proved in the field to reliably support
Ethernet, Token Ring, and FDDI networks via VTP.
The use of consistent VLAN naming was a requirement for successful use of VMPS (Vlan
Membership Policy Server). VTP ensures the consistency of VLAN names across the VTP
domain. Most VMPS implementations are likely to be migrated to a newer, more flexible and
feature-rich method.
To add support for Token Ring, VTP version 1 was enhanced and called VTP version 2. Certain
other minor changes and enhancements were also added at this time.
The functional base in VTP version 3 is left unchanged from VTP version 2, so backward
compatibility is built in. It is possible, on a per link basis, to automatically discover and support
VTP version 2 devices.
VTP version 3 adds a number of enhancements to VTP version 1 and VTP version 2:

Support for a structured and secure VLAN environment (Private VLAN, or PVLAN)
Support for up to 4k VLANs
Feature enhancement beyond support for a single database or VTP instance
Protection from unintended database overrides during insertion of new switches
Option of clear text or hidden password protection
Configuration option on a per port base instead of only a global scheme
Optimized resource handling and more efficient transfer of information
These new requirements made a new code foundation necessary. The design goal was to make
VTP version 3 a versatile vehicle. This was not only for the task of transferring a VLAN DB but
also for transferring other databases-for example, the MST database.

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