English to Chinese Tech/Engineering Computers: Systems, Networks

Conversely, the information available from engineering tools such as protocol analysers or IP sniffers is incredibly rich; however, it is very difficult to manage the massive amounts of data produced and use it effectively. Lastly, protocol analysers and sniffers don’t support drive test, call trace or other radio network data sources, and as such don’t give visibility of the radio network — a key part of the end-to-end chain.
试译：
反过来，协议分析仪或者IP嗅探器等技术工具获得的信息又过于丰富。不过，要管理获得的大量信息、加以有效使用又非常难。最后，协议分析仪和嗅探器并不支持路测、呼叫跟踪或者其它无线网络数据源，正因为如此，也就无法提供无线网络的详细情况，而无线网络又是端到端链（？？？）的一个关键部分。
这个chain具体指什么？