13 网络基本知识

网络 OSI模型与TCP/IP模型对应图 : TCP三次握手 Created with Raphaël 2.1.2 Client Client Server Server 1 : SYN=1,seq=x 2 : SYN=1,ACK=1,seq=y,ack=x+1 3 : ACK=1,seq=x+1,ack=y+1 TCP四次断开 Created with Raphaël 2.1.2 Client

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