说明：  计算机网络-自定向下，学习计算机网络的圣经，深入浅出的讲解对于初学者和深入学的人都很有帮助，为全英文电子版。
(Computer Network - Self-directed, learning the computer network of the Bible, explain in a simple and easy-to-facilitate way for beginners and in-depth study of people are very helpful for the entire English electronic version.)