What is the primary benefit of the Virtual Local Area Network (VLAN) Trunking Protocol (VTP)?

A.
broadcast control

B.
frame tagging

C.
inter-VLAN routing

D.
consistent VLAN configuration across switches in a domain

Explanation:
VTP manages configured VLANs across a switched network and maintains consistency of VLAN information
throughout a VTP domain. When an administrator adds, deletes, or renames VLANs, VTP propagates this
information to all other switches in the VTP domain. This makes the process of VLAN changes a plug-and-play
activity. This protocol was developed by, and remains proprietary to Cisco Systems.
Broadcast control is not the primary benefit of VTP. Broadcast control is achieved by using VLANs. VLANs
segment the network into logical broadcast domains. This helps in the reduction of unnecessary traffic over the
network and optimizes the available bandwidth use. VTP pruning helps reduce broadcast and unknown unicast
over VLAN trunk links. However, this is not the primary benefit of VTP.
Frame tagging is required for VLAN identification as frames traverse trunk links in a switch fabric. Inter-Switch
Link (ISL) and IEEE 802.1q are the two methods of frame tagging available on Cisco devices. ISL is proprietary
to Cisco, whereas IEEE 802.1q is a standard method. VTP is not a frame tagging method.
Inter-VLAN routing is achieved by an Open Systems Interconnect (OSI) Layer 3 device (Router). Inter-VLAN
routing is not a benefit of VTP.
Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot VLANs (normal/extended range) spanning multiple switches

Cisco > Support > LAN Switching > Virtual LANS / VLAN Trunking Protocol (VLANS/VTP) > Configure >
Configuration Examples and Technotes > Configuring VLAN Trunk Protocol (VTP) > Document ID: 98154
Cisco > Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide, 12.2(25) > Understanding and
Configuring VLANs, VTP, and VMPS