| 1. | True or false: You can use VTP domains to separate broadcast domains. |
| Answer: | False. Broadcast domains can be separated only with VLANs because a VLAN defines a broadcast domain's boundaries. A VTP domain is a different concept; it defines the management domain where a set of switches can exchange information about VLAN configuration. |
| 2. | What VTP modes can a Catalyst switch be configured for? Can VLANs be created in each of the modes? |
| Answer: | Server, client, and transparent modes. VLANs can be created in server mode. VLANs cannot be created in client mode. In transparent mode, VLANs can be created, but only on the local switch; they are not advertised to other switches. |
| 3. | How many VTP management domains can a Catalyst switch participate in? How many VTP servers can a management domain have? |
| Answer: | A switch can be a member of only one VTP management domain. A domain must have at least one server for VLAN changes to be propagated throughout the domain. There can be more than one server, for redundancy. |
| 4. | What conditions must exist for two Catalyst switches to be in the same VTP management domain? |
| Answer: | Both switches must have the same VTP domain name defined and enabled, both switches must be adjacent on a trunk link, and trunking must be enabled and active between them. Two switches also can operate in the same VTP domain if one of them is new and has the default NULL domain name. That switch will listen and pick up the first VTP domain name it hears in VTP advertisements. |
| 5. | On a VTP server switch, identify what you can do to reset the VTP configuration revision number to 0. |
| Answer: | Set the VTP domain name to a bogus value and change it back. Configure the switch for VTP transparent mode and then configure the switch back to server mode. |
| 6. | How can you clear the configuration revision number on a VTP client? |
| Answer: | You can't. The VTP client bases all VLAN and VTP information on advertisements from a VTP server. Therefore, the configuration revision number on the client comes directly from the same number on the server. |
| 7. | Complete this command to make all VLANs other than 30 and 100 eligible for pruning on the trunk interface: switchport trunk pruning vlan__________ |
| Answer: | switchport trunk pruning vlan except 30,100 |
| 8. | Which VLAN numbers are never eligible for VTP pruning? Why? |
| Answer: | VLAN numbers 1 and 1001 to 1005. VLAN 1 is reserved as a VLAN for control protocol traffic, and VLANs 1002 to 1005 are reserved as the default FDDI and Token Ring function VLANs. |
| 9. | What does the acronym VTP stand for? |
| Answer: | VLAN Trunking Protocol |
| 10. | What VTP domain name is defined on a new switch with no configuration? |
| Answer: | A NULL or empty string. The switch defaults to server mode and learns a VTP domain name from the first VTP server heard on a trunk link. Otherwise, you manually must configure the domain name. |
| 11. | In a network of switches, VTP domain Engineering has been configured with VLANs 1, 10 through 30, and 100. The VTP configuration revision number is currently at 23. Suppose a new switch is connected to the network, and it has the following configuration: VTP domain Engineering, VTP server mode, only VLANs 1 and 2 defined, and configuration revision number of 30. What happens when the switch is connected to the network? |
| Answer: | Because the new switch has a higher configuration revision number, the other switches in the VTP domain Engineering will learn all its VLAN and VTP configuration information. The new switch has two VLANs configured on itself: VLAN 1 and 2. The other switches will assume that they should delete all VLANs except for VLAN 1, and VLAN 2 will be created. Obviously, this will cause a major outage on the network because active VLANs 10 through 30 and 100 will be deleted and will go inactive. A network administrator will have to manually restore the configurations of those VLANs. |
| 12. | A VTP client switch has VLANs 1, 2, 3, 10, and 30 configured as part of a VTP domain; however, the switch has users connected only to access switch ports defined on VLANs 3 and 30. If VTP pruning is enabled and all VLANs are eligible, which VLANs will be pruned on the upstream switch? |
| Answer: | 2, 10 |
| 13. | The VTP domain Area3 consists of one server and several clients. The server's VTP configuration revision number is at 11. A new switch is added to the network. It has VTP domain name Area5 and a configuration revision number of 10. What happens when the new switch is added to the network? What happens when the VTP domain name is changed to Area3 on the new switch? |
| Answer: | Domain Area5 will experience no change when the switch is added. The two domains, Area3 and Area5, will coexist on the same network with different sets of clients. The configuration revision numbers on both servers will stay unchanged. When the domain is changed to Area3, that domain then will have two VTP servers. The switch that has the newly configured domain name has a lower configuration revision number, so it will learn all VTP information from the existing server. The new switch's revision number will become 11, and its list of defined VLANs will change to match the existing server. |
| 14. | What command shows information about the VTP configuration on a Catalyst 3560? |
| Answer: | show vtp status |
