>I believe that the listening device has to be on the subnet that it
>wants to listen to. Sniffer can snoop all packets that come accross the
>subnet, even filter on specific contents. However, not accross subnets.
Sniffers can most certainly probe multiple subnets. Sniffers work at lower
levels and don't care about IP addresses unless you set filters for
them.
Since they work at the lower levels, Ethernet sniffers cannot probe across a
bridge or router. But FDDI sniffers can since FDDI traffic by design must
traverse the whole ring.
Matt Holdrege matt @
phs .
com MH235
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