本书完整而详细地介绍了TCP/IP协议是如何实现的。书中给出了约500个图例，15 000行实际操作的C代码，采用举例教学的方法帮助你掌握TCP/IP实现。本书不仅说明了插口API和协议族的关系以及主机实现与路由器实现的差别。还介绍了4.4BSD-Lite版的新的特点，如多播、长肥管道支持、窗口缩放、时间戳选项以及其他主题等等。读者阅读本书时，应当具备卷1中阐述的关于TCP/IP的基本知识。本书适用于希望理解TCP/TP协议如何实现的人，包括编写网络应用程序的程序员以及利用TCP/IP维护计算机网络的系统管理员。

-the book complete and detailed presentation of the TCP / IP protocol is how to achieve it. The book is about 500 Legend, OK 15000 actual operation of the C code, For the use of teaching methods to help you master the TCP / IP protocol. The book shows not only the socket API and agreements ethnic relations and hosts and routers to achieve the difference. Also introduced 4.4BSD-Lite version of the new features, such as multicast, long fat pipe, window zoom, timestamp options and other topics, etc.. Readers of this book, Volume 1 should have elaborated on the TCP / IP basic knowledge. This applies to hope to understand TCP / TP how to achieve the agreement, including the preparation of Web applications programmers and the use of TCP / IP to safeguard the computer network system administrator.