现在几乎所有的板卡都被设计成PnP/Jumpless型(即插即用与免跳线),于是二者常被看作同义词。的确,凡是即插即用型的硬件,绝大多数都是免跳线的,在市面上能看到的例外是ISA的MO-DEM,在这种卡上面常常有一排跳线,可以直接设定IRQ等参数或者将该卡设置为PnP。然而反过来讲,免跳线的硬件则并不一定是即插即用的。以笔者手头的两块网卡为例,一块是Intel EtherExpress 16(AUI/BNC),另一块是使用Davi-Com芯片的兼容NE2000网卡 Almost all cards are now designed PnP / Jumpless type (plug and play and jumpers), so both are often seen as synonymous. Indeed, any plug-and-play type of hardware, the vast majority are jumper-free, can see the exception in the market is the ISA MO-DEM, in this card there is often a row of jumpers can be set directly Set parameters such as IRQ or set the card to PnP. Conversely, the jumper-free hardware is not necessarily plug-and-play. In my hands on the two cards, for example, one is the Intel EtherExpress 16 (AUI / BNC), the other is a compatible Davi-Com chip NE2000 network card