In arpanet , a background program in the interface message processor ( imp . these programs include the statistics generation routines , the debug facilities , and the imp console teletype handler 在目的代碼中安插的斷點(diǎn),使得執(zhí)行在適當(dāng)?shù)臅r(shí)間和位置上轉(zhuǎn)向查錯(cuò)程序。
The Interface Message Processor (IMP) was the packet-switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers.