Drivers for buses that support hot plugging of devices during a session (as do USB and PCMCIA) also monitor some sort of hardware signal that indicates arrival of a new device, whereupon the driver reenumerates its bus.

• 在一个会议期间（比如USB和PCMCIA），支持热插拔设备的总线驱动也监控一些硬件信号端口，这些信号表明一个新的硬件的到来，因此，这个驱动重新列决它的总线。