Perface(TCP/IP 协议族)

Technologies ralated to networks and internetworking by the fastest growing in our culture today. Many professors and students who have used, read or reviewed these changes. In the fourth edition, I have reorganization of a new edition that include changes and added several new chapters and appendices. 

　　The fourth edition of the book assumes the reader has no prior knowledge of the TCP/IP protocol suite, although a previous course in data communications is desirable.