CCNA的网络工程师的笔记。全面记录各章节要点，重点，难点-CCNA network engineers notebook. A comprehensive record of the chapters points, focus and difficult

课件和书籍都包括在里面，是学习计算机网络原理不可多得的好资料-Courseware and books are included in the inside is rare to learn principles of computer networks, a good information

最经典的计算机网络书籍,主要讲述了现有网络的运作和基本结构-classic

系统的提供了计算机网络中各层和各主要协议的ppt，能容真实生动，特别适合搞网络和协议方面的技术人员使用-Technical personnel to use the system to provide the computer network layers and protocols ppt, to accommodate real and vivid, particularly suited to engage in network