监听模式（monitor mode），或 RFMON（Radio Frequency MONitor），是指无线网卡可以接收所有经过它的数据流的工作方式，对应于IEEE 802.11网卡的其他模式，诸如Master（路由器）、Managed（普通模式的网卡）、Ad-hoc等。监听模式不区分所接收数据包的目标MAC地址，这点和混杂模式类似。然而，和混杂模式不同的是，监听模式的不需要和无线接入点（AP）或Ad-hoc网络创建连接。监听模式是无线网卡特有的特殊模式，而混杂模式应用于有线网卡和无线网卡。

Monitor mode, or RFMON (Radio Frequency MONitor) mode, allows a computer with a wireless network interface controller (WNIC) to monitor all traffic received from the wireless network. Unlike promiscuous mode, which is also used for packet sniffing, monitor mode allows packets to be captured without having to associate with an access point or ad hoc network first. Monitor mode only applies to wireless networks, while promiscuous mode can be used on both wired and wireless networks. Monitor mode is one of the seven modes that 802.11 wireless cards can operate in: Master (acting as an access point), Managed (client, also known as station), Ad hoc, Mesh, Repeater, Promiscuous, and Monitor mode.