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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?

Answer» Virtual Trunk Protocol (VTP) is used to pass a VLAN database to any or all switches in the switched network. The three VTP modes are server, client, and transparent.
Discussion
2.

A switch has been configured for three different VLANs: VLAN2, VLAN3, and VLAN4. A router has been added to provide communication between the VLANs. What type of interface is necessary on the router if only one connection is to be made between the router and the switch?

Answer» Although you can use either 100Mbps or 1Gbps Ethernet, the 100Mbps is necessary at a minimum and is the best answer to this question. You need to trunk the link from the switch to the router to make this connection work with inter-VLAN communication.
Discussion
3.

What VTP mode allows you to change VLAN information on the switch?

Answer» Only in server mode can you change VTP information on a switch.
Discussion
4.

When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?

Answer» By default, all VLANs are allowed on the trunk link and you must remove by hand each VLAN that you don't want traversing the trunked link.
Discussion
5.

To configure the VLAN trunking protocol to communicate VLAN information between two switches, what two requirements must be met?

Answer» You must have the same VTP domain name on all switches in order to share VLAN information between the switches. At least one of the switches must be a VTP server; the other switches should be set to VTP client.
Discussion
6.

Which switching technology reduces the size of a broadcast domain?

Answer» Virtual LANs break up broadcast domains in layer 2 switched internetworks.
Discussion
7.

You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?

Answer» This question is a little vague, but the best answer is that the VLAN membership for the port is not configured.
Discussion
8.

Which command will configure a switch port to use the IEEE standard method of inserting VLAN membership information into Ethernet frames?

Answer» If you are on a 2950 switch, then the interface command is just switchport mode trunk, since the 2950 can only run the IEEE 802.1Q version. However, a 3550 can run both ISL and 802.1Q, so you must use the encapsulation command. The argument to choose 802.1Q for a trunking protocol is dot1q.
Discussion