关于网络协议

 

 

tcp报文结构

位码即tcp标志位，
有6种标示：SYN(synchronous建立联机) ACK(acknowledgement 确认) PSH(push传送) FIN(finish结束) RST(reset重置) URG(urgent紧急)Sequence number(顺序号码) Acknowledge number(确认号码)

tcp连接状态

 

参考

https://blog.csdn.net/u013719012/article/details/53125953

https://blog.csdn.net/gavin_john/article/details/53186570

http://www.360doc.com/content/16/0524/22/16915_562024417.shtml

https://blog.csdn.net/sinat_32487221/article/details/55272283

https://blog.csdn.net/mrharvey/article/details/20647739

阮大神的两篇。。

http://www.ruanyifeng.com/blog/2012/05/internet_protocol_suite_part_i.html

http://www.ruanyifeng.com/blog/2012/06/internet_protocol_suite_part_ii.html