Answer Posted / prakash parmar

In computing, promiscuous mode or promisc mode is a
configuration of a network card that makes the card pass
all traffic it receives to the central processing unit
rather than just packets addressed to it — a feature
normally used for packet sniffing.

Each packet includes the hardware (Media Access Control)
address. When a network card receives a packet, it checks
if the address is its own. If not, the card normally drops
the packet. But in promiscuous mode, the card doesn't drop
the packet, thus allowing the computer to read all packets.

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