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SMART
RADIO
VLAN
Virtual Local Area Networking is a
technology specified in IEEE 802.1Q
standard. VLAN can be used to
separate physical LAN to multiple
virtual LANs and thus differentiate
and control the access of devices
connected physically to the same
network. The following figure
illustrates the separation of the
physical LAN.
PHYSICAL LAN
Physical LAN is a network consisting
of L2 devices such as switches and
hubs. On the edges of the physical
LAN are the host devices, such as
PLCs, management computers and
routers. SATELLAR radio modem
functions as a router.
BROADCAST DOMAIN
Boundaries for a LAN can also be
defined by the reach of the
broadcasts sent to the network. An
example of such broadcast is the ARP
(Address Resolution Protocol) request,
which is used by the Ethernet
protocol to find the MAC address of
the specific IP destination address.
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Switch will copy the received broadcast
message to all of its ports.
Broadcast
Broadcast
Switch
VLAN B:
data network
VLAN A:
monitoring
network
physical LAN
host
router
host
SATELLAR AND VLAN
1. OVERVIEW TO VIRTUAL LOCAL AREA NETWORKING
Technical Bulletin 2/14
August 2014