Monitor mode enables a wireless network card to passively capture packets without associating with an access point, or
ad-hoc network, without transmitting any packets. Another aspect of a
nic in monitor mode is that the card does not check
CRC values for packets.
Promiscuous mode allows a wireless
NIC to view all packets on a network that you're associated with. The card will not see any packets until it has associated with a network. Not all wireless NICs and drivers support promiscuous mode.
