("Foundation of Computer Network" video download PPT to download the software required for the experimental manual, please download the "Foundation of Computer Network" published by the university and edited by the Network Teaching and Research Office of the School of Software, Normal University. The positioning of this book is the use of network technology. The book has no plan for readers to develop TCP\IP protocols, and no plan for readers to design Ethernet or make network equipment. Therefore, after completing this book, you may not be able to apply for a graduate degree in computer science. How helpful, if you want to participate in the office, protect the network and clear the network fault, design the enterprise office network and remote access network, and network security are satisfied. This book tells a lot of cases so that readers can have a good understanding of the OSI reference model, understand the TCP\IP protocol, and use these theories to use in network security and network troubleshooting, making these general tools very detailed. Each chapter uses PacketTracer to design experimental scenarios and experimental procedures and Dynamips software to build an experimental environment. Readers can verify what they have learned according to the process in the book. There are complete PPT and video education. The content of the book includes 90% of the common sense of CCNA, and also covers the technologies often used in enterprises in CCNP.)