data gathering network

The sar tool is useful for gathering network utilization statistics and recording snapshots of all utilization data to a file over a period of time.

sar 工具用于收集一段时间内的网络利用率统计数据，并将所有利用率数据的快照记录到一个文件。

Sniffing is a common way in gathering and intercepting network data, but malicious sniffing often does great harm to network security.

嗅探是一种常见的网络数据采集和侦听方式，恶意嗅探对网络安全具有极大的危害。

Specifically introduced its system constitution, the network communication as well as data gathering.

具体介绍了其系统的构成、网络通信的实现以及数据的采集。