Answers to Review Questions

Answers to Review Questions

Refer to Figure 12-17 for all review questions.

1:

In what mode is the link between the two Catalysts?

A:

The link is not a trunk because Cat-A is set to ON and Cat-B set to AUTO. Although this normally forces a link into trunk mode, the two ends belong to different domains preventing the establishment of a trunk. You must set both ends to ON or nonegotiate. The link is, therefore, an access link.

2:

Change both ends of the trunk to ON. Can PC-1 ping PC-2?

A:

Yes, both are in the same VLAN and the same subnet.

3:

Can Cat-A ping Cat-B?

A:

Yes, SC0 for both Catalysts belong to the same VLAN and the same subnet.

4:

Can Cat-B ping PC-2?

A:

Even though SC0 and PC-2 belong to the same subnet, they belong to different VLANs. Therefore, they cannot ping each other.

5:

VLAN 2 used to be called oldlan2. An administrator at Cat-A renames VLAN 2 to newlan2. Does Cat-B know about the new name, newlan2?

A:

Cat-B does not know about newlan2 because the two Catalysts are in different VTP domains. The only way for Cat-B to learn about newlan2 is to manually configure it somewhere in the VTP domain world.

6:

clear config all on Cat-B. Reenter the IP address on SC0. Can Cat-B ping Cat-A?

A:

After clearing the configuration of Cat-B and resetting the IP address on SC0, the two Catalysts can ping each other because they are in the same VLAN and subnet.

7:

Can PC-2 ping PC-1?

A:

PC-2 cannot ping PC-1 because they are now in different VLANs. Clearing the configuration of Cat-B, set all ports to VLAN 1.

8:

Does Cat-B know about newlan2?

A:

Assuming that Cat-B did not receive a VTP update from another Catalyst in a different VTP domain, Cat-B now belongs to domain wally. The link between the two Catalysts should be a trunk, because Cat-A is set to ON and Cat-B is set to AUTO. This allows Cat-B to receive the VTP updates from Cat-A and, therefore, to learn about newlan2.

9:

Can Cat-B remove newlan2?

A:

Yes. If it is set up as either a VTP Server or transparent mode, it can remove newlan2. Because this follows a clear config all, the Catalyst is by default set to a VTP server.