VTP default behavior: Which statement is true about VLAN Trunking Protocol (VTP) by default on Cisco switches?

Introduction / Context:
VTP simplifies VLAN management across Cisco switches. Understanding default VTP mode is critical for configuration and troubleshooting.

Given Data / Assumptions:

• Switch type: Cisco Catalyst
• Default VTP mode must be identified

Concept / Approach:
When powered on, Cisco switches default to VTP server mode. In this mode, VLAN changes can be created, modified, or deleted and propagated to other switches in the same VTP domain.

Step-by-Step Solution:

Verification / Alternative check:
Run show vtp status; newly initialized switch will show mode = server.

Why Other Options Are Wrong:

• B: Transparent is optional, not default.
• C: Default domain name is null, not “Cisco.”
• D: Default is not client mode.
• E: VTP is active by default, not disabled.

Common Pitfalls:
Misremembering default domain name; confusing transparent with server mode.

Final Answer:
All switches are VTP servers by default.