Which three statements are typical characteristics of VLAN arrangements? (Choose three.)
A.
A new switch has no VLANs configured.
B.
Connectivity between VLANs requires a Layer 3 device.
C.
VLANs typically decrease the number of collision domains.
D.
Each VLAN uses a separate address space.
E.
A switch maintains a separate bridging table for each VLAN.
F.
VLANs cannot span multiple switches.
I can tell you VLANs are good when you want to connect several computers that are at different places.
This solution is very flexible and can provide high performance.
The following page explains VLANs with a video tutorial in relation with Ozeki Phone System XE. http://www.ozekiphone.com/what-is-vlan-342.html
By default, all ports on a new switch belong to VLAN 1 (default & native VLAN). There are also some well-known VLANs (for example: VLAN 1002 for fddi-default; VLAN 1003 for token-ring…) configured by default -> A is not correct.
To communicate between two different VLANs we need to use a Layer 3 device like router or Layer 3 switch -> B is correct.
VLANs don’t affect the number of collision domains, they are the same -> C is not correct. Typically, VLANs increase the number of broadcast domains.
We must use a different network (or sub-network) for each VLAN. For example we can use 192.168.1.0/24 for VLAN 1, 192.168.2.0/24 for VLAN 2 -> D is correct.
A switch maintains a separate bridging table for each VLAN so that it can send frame to ports on the same VLAN only. For example, if a PC in VLAN 2 sends a frame then the switch look-ups its bridging table and only sends frame out of its ports which belong to VLAN 2 (it also sends this frame on trunk ports) -> E is correct.
We can use multiple switches to expand VLAN -> F is not correct.