VLAN Trunking Protocol is a Cisco protocol that propagates the definition of VLANs over the local area network.
Which two statements are true? (Choose two.)
When a new switch is added to the network, by default it is configured with no VTP domain name or password, but in VTP server mode.
If no VTP Domain Name has been configured, it assumes the one from the first VTP packet it receives.
Since a new switch has a VTP configuration revision of 0, it will accept any revision number as newer and overwrite its VLAN information if the VTP passwords match.https://en.wikipedia.org/wiki/VLAN_Trunking_Protocol
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol used to propagate the definition of VLANs over the local area network. VTP manages the addition, deletion, and renaming of VLANs on a network-wide basis, simplifying VLAN configuration and management.
The correct statements are:
A. When Cisco switches are started from scratch, they are in server mode and their domain is set to null.
This statement is true. When a Cisco switch is first powered on or reset to its default configuration, it will be in server mode with a VTP domain name set to null. The switch will not forward VTP updates until it is configured with a VTP domain name.
B. VTP transparent mode forwards VTP packets and can act as a client or a server.
This statement is also true. VTP transparent mode forwards VTP packets, but it does not participate in VTP updates. A switch in transparent mode will forward VTP advertisements it receives but will not propagate its own VLAN database to other switches. Additionally, a switch in transparent mode can act as a client or a server in terms of VLAN configuration.
C. VTP requires trunk mode interfaces to propagate.
This statement is false. VTP updates are sent over trunk links, but VTP does not require that all interfaces be in trunk mode. VLAN information can also be propagated over access links, but it is limited to the VLAN configured on that particular access port.
D. VTP config revision increases based on switch uptime.
This statement is true. The VTP configuration revision number is a 32-bit number that increments each time a change is made to the VLAN database. The revision number is based on switch uptime and is propagated to other switches in the VTP domain.
E. VTP requires access mode interfaces to propagate.
This statement is false. VTP updates can be sent over both trunk and access links, but the scope of the update is limited to the VLAN configured on that particular access port. However, it is recommended to configure VTP over trunk links to avoid any VLAN misconfigurations.
In conclusion, A and B are the correct statements.