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3-6. Virtual LAN
What is a VLAN?
It is a subset of a LAN. Before we discuss VLAN, we must understand what a LAN is. In general, a
LAN is composed of different physical network segments bridged by switches or bridges which attach to
end stations in the same broadcast domain. The traffic can reach any station on the same LAN. Beyond
this domain, the traffic cannot go without router's help. This also implies that a LAN is limited. If you need
to communicate with the station outside the LAN, a router is needed which always lies on the edge of the
LAN.
For a layer 2 VLAN, it assumes it is a logical subset of a physical LAN separated by specific rules
such as tag, port, MAC address and so on. In other words, they can communicate with each other
between separated small physical LANs within a LAN but cannot be between any two separated logical
LANs.
Function name:
Configuration File Transfer
Function description:
You can backup your switch's configuration file into your computer folder in case accident happens.
In addition, uploading backup configuration file into a new or a crashed switch can save much time
and avoid mistakes.
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