TCPIP protocol of this tutorial helped me a great hope in this regard quite good to help a friend

TCPIP协议\第1章概述.pdf
.........\第3章IP：网际协议.pdf
.........\第4章ARP：地址解析协议.pdf
.........\第5章RARP：逆地址解析协议.pdf
.........\第2章链路层.pdf
.........\第8章Traceroute程序.pdf
.........\第7章Ping程序.pdf
.........\第10章动态选路协议.pdf
.........\第11章UDP：用户数据报协议.pdf
.........\第9章IP选路.pdf
.........\第14章DNS：域名系统.pdf
.........\第15章TFTP：简单文件传送协议.pdf
.........\第13章IGMP：Internet组管理协议.pdf
.........\第12章广播和多播.pdf
.........\第16章BOOTP：引导程序协议.pdf
.........\第17章TCP：传输控制协议.pdf
.........\第18章TCP连接的建立与终止.pdf
.........\第19章TCP的交互数据流.pdf
.........\第20章TCP的成块数据流.pdf
.........\第21章TCP的超时与重传.pdf
.........\第22章TCP的坚持定时器.pdf
.........\第23章TCP的保活定时器.pdf
.........\第24章TCP的未来和性能.pdf
.........\第25章SNMP 简单网络管理协议.pdf
.........\第27章FTP：文件传送协议.pdf
.........\第28章SMTP 简单邮件传送协议.pdf
.........\第29章网络文件系统.pdf
.........\第30章 其他的TCPIP应用程序.pdf
.........\第26章Telnet和Rlogin：远程登录.pdf
TCPIP协议

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