说明：  这是一本图文并茂的网络管理技术书籍，旨在让广大读者理解TCP/IP的基本知识、掌握TCP/IP的基本技能。 书中讲解了网络基础知识、TCP/IP基础知识、数据链路、IP协议、IP协议相关技术、TCP与UDP、路由协议、应用协议、网络安全等内容，引导读者了解和掌握TCP/IP，营造一个安全的、使用放心的网络环境。 本书适合计算机网络的开发、管理人员阅读，也可作为大专院校相关专业的教学参考书。
(This is a network management technology book with both pictures and text. It aims to let readers understand the basic knowledge of TCP / IP and master the basic skills of TCP / IP. The book explains the basic knowledge of network, basic knowledge of TCP / IP, data link, IP protocol, IP protocol related technology, TCP and UDP, routing protocol, application protocol, network security and other contents, so as to guide readers to understand and master TCP / IP and create a safe and reliable network environment. This book is suitable for the development and management of computer network, and can also be used as a teaching reference book for related majors in Colleges and universities.)