顾名思义，TcpDump可以将网络中传送的数据包的“头”完全截获下来提供分析。它支持针对网络层、协议、主机、网络或端口的过滤，并提供and、or、not等逻辑语句来帮助你去掉无用的信息。tcpdump就是一种免费的网络分析工具，尤其其提供了源代码，公开了接口，因此具备很强的可扩展性，对于网络维护和入侵者都是非常有用的工具。tcpdump存在于基本的FreeBSD系统中，由于
Some applications may need to read or write data to multiple buffers, which are separated in memory. Although this can be done easily enough with multiple calls to read and write, it is inefficient
Abbreviated as TSO, TCP segmentation offload is used to reduce the CPU overhead of TCP/IP on fast networks. TSO breaks down large groups of data sent over a network into smaller segments that pass thr
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