说明：  《计算机网络自顶向下方法》是2009年机械工业出版社出版的图书，作者是（美）库罗斯。本书是当前世界上最为流行的计算机网络教科书之一，讲解以因特网为例，学以致用。
(Top-down Approaches to Computer Networks is a 2009 book published by Machine Industry Press, by (USA) Kouros. This book is one of the most popular computer networking textbooks in the world. It explains how to use the Internet as an example.)