Answer Posted / surjeet gimit

before understand vlan, we must have to understand of the
defination of lan..
{ lan include the all devices in the same broadcast domain}

broadcast domain include the set of lan-connected devices,
when any of the devices send a broadcast frame all the
other devices get a copy of the frame, so think of a lan
and a broadcast basically the same thing.

without vlan, switch consider all its interfaces to be in
the same broadcast domain, in other words all connected
devices are in the same lan.

With vlan, a switch can put some interfaces into one
broadcast domain and some into another creating multiple
broadcast domain. these individual broadcast domain created
by switch are called Vlan.....

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