General technical discussions.
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Sun Aug 22, 2010 1:53 am

what is promiscuous mode and why its useful in switched LAN?

Mon Jan 29, 2018 11:53 am

i have read about promiscuous mode, it states in most places that it lets a NIC process frames that have a different MAC dest address than the one the NIC is having, having said that, how is it useful in a switched LAN where each host sits in his own collision domain?

if i activate promiscuous mode in a host that is connected to the switch im not supposed to get frames that isnt carrying my dest mac anyway, so is it only useful for networks with hosts that share the same collision domain, like WLAN?
can anyone clarify?

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