VTP Questions

Note: If you are not sure about VLAN Trunking Protocol, please read our VLAN Trunking Protocol VTP Tutorial.

Question 1

Explanation

With VTP, switches can learn VLAN configuration of other switches dynamically.

Question 2

Explanation

VLAN Trunking Protocol (VTP) allows a network manager to configure a switch so that it will propagate VLAN configurations to other switches in the network automatically.

Question 3

Explanation

Only VTP Client cannot make a change to VLAN.

Question 4

Explanation

The Dynamic Trunking Protocol (DTP) is a proprietary networking protocol developed by Cisco for the purpose of negotiating trunking on a link between two switches, and for negotiating the type of trunking encapsulation to be used.

In dynamic auto mode, the interface is able to convert the link to a trunk link. The interface becomes a trunk interface if the neighboring interface is set to trunk or desirable mode. The default switchport mode for newer Cisco switch Ethernet interfaces is dynamic auto. Note that if two Cisco switches are left to the common default setting of auto, a trunk will never form.

In dynamic desirable mode, the interface actively attempt to convert the link to a trunk link. The interface becomes a trunk interface if the neighboring interface is set to trunk, desirable, or auto mode. This is the default switchport mode on older switches, such as the Catalyst 2950 and 3550 Series switches -> This is the best answer in this question.

Reference: http://www.ciscopress.com/articles/article.asp?p=2181837&seqNum=8

Note: In this question answer “Trunk” is also correct. Maybe this is an error question. But Cisco requires us to pick up the best answer even such an error occurs so we believe “Dynamic desirable” is the best option here.

Question 5

Explanation

In Cisco switches there are two encapsulations: 802.1q and ISL so we can set two ends to ISL instead -> A is not correct.

The ports between two switches must be set to trunk ports so that they can exchange VLAN information through VTP -> C is not correct.

To connect two switches we can use cross-over cable or straight-through cable (because modern Cisco switches can “auto-sense”) but not rollover cable -> E is not correct.

To forward traffic in the same VLAN (between two or more switches) we can use switches only. If we want to forward VTP traffic between different VLANs we can use either a router or a Layer 3 switch -> F is not correct.

Two switches can only communicate when they are set to the same VTP domain name (and the same VTP password) -> B is correct.

One of the two switches must be set to VTP Server so that it can create VTP updates and advertise its VLAN information.

Question 6

Explanation

VTP server usually has the same revision number with other switches (when they are synchronized) so answer C is not correct. To run VTP, the VTP domain names and VTP version must be matched among the devices running VTP.