One of the key concepts of switching and routing is the usage of a virtual Local Area Network a villain.
Imagine that you have a local area network that consists of a switch and different stations that are
connected to its port.
This kind of phone network is considered to be a one broadcast domain every frame that is being sent
in the network is being broadcasted all over to every member that is connected to the switch in your
home network one broadcast domain may not be an issue but on large networks where you have dozens and
hundreds of devices that are members of different divisions that is marketing division finance division.
You have to use virtual alliance you have to split your network into different broadcast domain.
It makes your network much more secure and much more efficient because fewer devices receive unnecessary
packets.
You can configure your villains either on transparent mode 48 or on a that mode following it.
Once you do it your ports are becoming a trunk port that is a port that is capable of delivering packets
from different domains and not only the domain that was configured initially on the physical interface
so let's move over and create some villains.
And in that way we will understand the usage much more clearly.
Let's head over to our network interfaces and currently we have two interfaces that one is connected
to the marketing division.
The second one is connected to the finance division.
Now that interface is also connected to a switch in our marketing division where everyone is connected
and using their desktop computers.
Now we want to divide traffic that is coming from the marketing employees and the marketing managers.
We can create another interface or configure another interface to be used only for the marketing managers.
But we want to do it on one physical port and divide that port into two broadcast to mean the one is
the broadcast domain of the physical port which is the standard zero for dot 1 and another one will
be created using a feeler so let's name our interface.
Name is one hundred and ten less idea.
Let's use the eye tag of far veal and also one hundred and ten and let's use the marketing managers
as our alias.
Now we'll use the 10 0 0 0 5 1 IP address on the 24 subnet mask
all right.
So already use it.
So let's do this six dot one.
All right now we will also use a DCP server let's enable administration access using H2 P S and H DTP.
All right.
Once we do it we can see that on the internal one interface we have actually created another broadcast
domain which belongs to the marketing manager that villain has the I D tag of one hundred and ten.
And now on our switch we can configure Vila.
It doesn't matter if it's a system switch or an HP switch we can configure a villain on the ports that
are connected.
To the marketing managers and desktop computers.
Once we can figure out feel and own debt port a feeling that belongs to the 10 dot 0 that's 6 that's
0 subnet which is our broadcast domain.
Any traffic that will come from our marketing managers through that switch will head over only to the
new villain that we have created and now we actually have to broadcast domain to secure networks that
are divided but they are logically exists on one internal interface.
Now our interface once we configure and you Vila has become a trunk interface.
It will deliver all the traffic that comes through that internal one interface all the native traffic
and that's why we say that the native traffic is the native of Vila but also the traffic that comes
from the second broadcast domain that we have just configured which belongs to the villain one hundred
and ten.