DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
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address
FF-FF-FF-FF-FF-FF
00-20-5C-01-11-11
Table-2 (Ethernet frame format)
When the switch receives the frame, it will check the “Source Address” in the Ethernet frame’s header . If the address
is not in its Forwarding Table, the switch will learn PC A’s MAC and the associated port into its Forwarding Table.
Port1 00-20-5C-01-11-11
In addition, when the switch receives the broadcast ARP request, it will flo od the fram e to all ports except the s ource
port, port 1 (see Figure -2).
Figure - 2
When the switch floods the frame of ARP requests to the network, all PCs wi ll rec eive and examine the frame but only
PC B will reply to the query as the destination IP address of PC B matc hes (see Figure-3).
Figure-3
Forwarding Table