Sniffing on a Switched Network
Traditional hub based networks propagate packets to all attacheddevices, operating in a single broadcast domain. This means all devices
can receive all the data transmitted on a broadcast media such as
Ethernet. Hubs act as multiport repeaters, no manipulation or routing
of the packets occur, the signal is simply regenerated to avoid
attenuation.
Switches differ from hubs in that they do process the data being
transmitted, and change their behavior accordingly. Switches facilitate:
• Address learning
• Packet forwarding
• Packet filtering
• Loop avoidance
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