客户机通过发送syn同步数据包发起到一个主机(和特定端口)的连接。
A client initiates a connection to a host (and a specific port) by sending a syn synchronize packet.
ud p_ resvspace—这个值应该大于udp_sendpsace,因为它需要处理每套接字的、尽可能多的同步udp数据包。
Udp_resvspace -this value should be greater than udp_sendpsace, because it needs to handle as many simultaneous udp packets per socket as it can.
当网络接口层从它的上一层收到一个数据包时,它就加上一个前同步信号以及循环冗余校验(CRC)。
When the network interface receives a packet from the layer above, it adds a preamble and CRC.
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