Switching and Virtual LANs Flashcards
You want to improve network performance by increasing the bandwidth available to hosts and limiting the size of the broadcast domains. Which of the following options will achieve this goal?
Managed hubs
Switches
Switches configured with VLANs
Switches configured with VLANs
By creating and implementing VLANs in your switched network, you can break up broadcast domains at Layer 2. For hosts on different VLANs to communicate, you must have a router or Layer 3 switch
The types of ports that can be found on a switch are _______ and ____________. (Choose two.)
VLAN Trunk Protocol
Access
802.1Q
Trunk
Access
Trunk
Hosts are connected to a switch and are members of one VLAN. This is called an access port. Trunk links connect between switches and pass information about all VLANs
Which switching technology reduces the size of a broadcast domain?
ISL
802.1Q
VLANs
VLANs
Virtual LANs break up broadcast domains in Layer 2 switched internetworks
Which of the following are IEEE versions of STP? (Choose two.)
VLANs
- 1D
- 11
- 1w
- 1D
- 1w
Both 802.1D and 802.1w are IEEE STP versions, with 802.1w being the latest and greatest version
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? (Choose two)
The STP configuration on the switch is not updated for the new host.
The host has an invalid MAC address.
The switch port the host is connected to is not configured to the correct VLAN membership.
STP shut down the port.
The switch port the host is connected to is not configured to the correct VLAN membership.
STP shut down the port.
The best answers are that the VLAN membership for the port is configured incorrectly and that STP shut down the port
Which of the following are benefits of VLANs? (Choose three.)
They increase the size of collision domains.
They allow logical grouping of users by function.
They can enhance network security.
They increase the size of broadcast domains while decreasing the number of collision domains.
They simplify switch administration.
They increase the number of broadcast domains while decreasing the size of the broadcast domains.
They allow logical grouping of users by function.
They can enhance network security.
They increase the number of broadcast domains while decreasing the size of the broadcast domains.
VLANs break up broadcast domains in a switched Layer 2 network, which means smaller broadcast domains. They allow configuration by logical function instead of physical location and can create some security if configured correctly
Which of the following is a Layer 2 protocol used to maintain a loop-free network?
VTP
STP
RIP
STP
The Spanning Tree Protocol is used to stop switching loops in a switched network with redundant paths
What is the result of segmenting a network with a bridge (switch)? (Choose two.)
It increases the number of collision domains.
It decreases the number of collision domains.
It increases the number of broadcast domains.
It makes smaller collision domains.
It increases the number of collision domains.
It makes smaller collision domains.
Bridges break up collision domains, which would increase the number of collision domains in a network and also make smaller collision domains
You connect your host to a switch that is running network analysis software. However, you are not seeing any packets from the server. What do you need to implement on the switch to see all the packet information?
VLANs
STP
Port mirroring
Port mirroring
In order to see all frames that pass through the switch and read the packets with a network analyzer, you need to enable port mirroring on the port your diagnostic host is plugged into
Which of the following features of a switch will allow two switches to pass VLAN network information?
PoE
VLANs
Trunking
Trunking
Trunking allows switches to pass information about many or all VLANs configured on the switches
What are the distinct functions of Layer 2 switching that increase available bandwidth on the network? (Choose three.)
Address learning
Routing
Forwarding and filtering
Creating network loops
Loop avoidance
Address learning
Forwarding and filtering
Loop avoidance
Layer 2 features include address learning, forwarding and filtering of the network, and loop avoidance
Which of the following statements is true?
A switch creates a single collision domain and a single broadcast domain. A router creates a single collision domain.
A switch creates separate collision domains but one broadcast domain. A router provides a separate broadcast domain.
A switch creates a single collision domain and separate broadcast domains. A router provides a separate broadcast domain as well.
A switch creates separate collision domains but one broadcast domain. A router provides a separate broadcast domain.
Switches break up collision domains, and routers break up broadcast domains
What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?
Forwards the switch to the first available link
Drops the frame
With the exception of the source port, floods the network with the frame looking for the device
With the exception of the source port, floods the network with the frame looking for the device
With the exception of the source port, switches flood all frames that have an unknown destination address. If a device answers the frame, the switch will update the MAC address table to reflect the location of the device
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?
Discard it and send an error message back to the originating host
Flood the network with the frame
Add the source address and port to the MAC address table and forward the frame out the destination port
Add the source address and port to the MAC address table and forward the frame out the destination port
Because the source MAC address is not in the MAC address table, the switch will add the source address and the port it is connected to into the MAC address table and then forward the frame to the outgoing port
When would you configure VTP on a switch?
When you have redundant links between switches
When you have multiple hosts in multiple VLANs and you want to share all the data between hosts without a router
When you have multiple switches with multiple VLANs and you want to share the VLAN database from one switch to all the others
When you have multiple switches with multiple VLANs and you want to share the VLAN database from one switch to all the others
Virtual Trunk Protocol (VTP) is a Cisco proprietary method of having a single VLAN database advertised to all other switches in your network. This allows for ease of VLAN management in a larger network. Option C is not a possible configuration, by the way; I made that up
