Q7: Which of the following is not a valid VTP mode?
Correct Answer: D
VTP is a Layer 2 messaging protocol. It carries configuration information throughout a single domain. VTP operates in one of three modes:
1. Server mode
2. Client mode
3. Transparent mode
VTP Servers can create, modify, or delete VLANs and other configuration parameters for the specified VLAN domain.
A VTP client can't create, change, or delete VLANs.
A VTP transparent mode is used when a switch is not required to participate in VTP, but only pass the information to other switches. Transparent switches don't work either as Server or clients.
Configurations made to a single switch, called VTP server, are propagated across the switch fabric under a single domain control. Other switches, configured as VTP clients, learn the configuration information from the server. It is important to know that, Cisco switches such as Catalyst 1900, acting as VTP servers save the VLAN configuration information in their Non volatile memory (NVRAM), whereas client keep the information only in running configuration.
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