5.12 Using VLANs

What are two advantages to creating VLANs on your network?

- You can create virtual LANs based on criteria other than physical location, such as workgroup, protocol, or service. - You can simplify device moves. Devices are moved to new VLANs by modifying the port assignment. - You can control broadcast traffic and create collision domains based on logical criteria. - You can control security (isolate traffic within a VLAN). - You can load-balance network traffic (divide traffic logically, rather than physically).

You have two VLANs configured on a single switch. How many broadcast domains are there? How many collision domains are there?

2 broadcast domains and 2 collision domains.

Which 802.1Q priority is IP phone traffic on a voice VLAN tagged with by default? - 8 - 3 - 1 - 5

5

You are adding switches to your network to support additional VLANs. Unfortunately, the new switches are from a different vendor than the current switches. Which standard do you need to ensure that the switches are supported? - 802.1Q - 802.1x - 802.11 - 802.3

802.1Q

Virtual LAN (VLAN)

A logical collection of devices that belong together and act as if they are connected to the same wire or physical switch.

Which of the following is an appropriate definition of a VLAN? - A logical grouping of devices based on service need, protocol, or other criteria. - A physical collection of devices that belong together and are connected to the same wire or physical switch. - A device used to route traffic between separate networks. - A device used to filter WAN traffic.

A logical grouping of devices based on service need, protocol, or other criteria.

The IT manager has asked you to create four new VLANs for a new department. As you are going through the VLAN configurations, you find some VLANs numbered 1002-1005. However, they are not in use. What should you do with these VLANs? - Delete them since they are not being used. - Renumber them and assign them to ports on the switch. - Nothing. They are reserved and cannot be used or deleted. - Configure them so they can be used on the new network.

Nothing. They are reserved and cannot be used or deleted.

A virtual LAN can be created using which of the following? - Gateway - Router - Hub - Switch

Switch

When configuring VLANs on a switch, what is used to identify which VLAN a device belongs to? - IP address - Host name - Switch port - MAC address

Switch port

You run a small network for your business that has a single router connected to the internet and a single switch. You keep sensitive documents on a computer that you would like to keep isolated from other computers on the network. Other hosts on the network should not be able to communicate with this computer through the switch, but you still need to access the network through the computer. What should you use for this situation? - Port security - Spanning Tree Protocol - VLAN - VPN

VLAN

You manage a network that uses a single switch. All ports within your building connect through the single switch. In the lobby of your building are three RJ-45 ports connected to the switch. You want to allow visitors to plug into these ports to gain internet access, but they should not have access to any other devices on your private network. Employees connected throughout the rest of your building should have both private and internet access. Which feature should you implement? - VLANs - NAT - DMZ -Port authentication

VLANs

The IT manager has asked you to create a separate VLAN to be used exclusively for wireless guest devices to connect to. Which of the following is the primary benefit of creating this VLAN? - You can control broadcast traffic and create a collision domain for just the wireless guest devices. - You can create a wireless guest network more affordably with a VLAN than you can with a router. - You can control security by isolating wireless guest devices within this VLAN. - You can load-balance wireless guest network traffic to have a lower priority than the rest of the traffic on the network.

You can control security by isolating wireless guest devices within this VLAN.

What happens if two devices on the same switch are assigned to different VLANs?

You cannot assign two devices multiple VLANs.

You are creating a VLAN for voice over IP (VoIP). Which command should you use? - switchport voip vlan [number] - switchport voice vlan [number] - switchport vlan voip [number] - switchport vlan voice [number]

switchport voice vlan [number]