(Huawei 3Com Network Academy Textbook Through the study of this textbook, the Academy can master the basic knowledge of network, clearly describe the network technologies supported by Huawei 3Com cameras, configure Huawei 3Com routers and Ethernet switches, and understand how to use these technologies to design and build network. After studying this textbook, the college has the ability to prepare for the HCNE exam. ………………)