(This book is impossible. I have searched a lot, and I think this is okay. You can read Chapter 1. Basic Learning Objectives of Local Area Networks. Understand the method of setting up a local area network. Understand the benefits of computer networking. Understand the topology of a local area network. Main points of this chapter. Attributes Types of Local Area Networks Classroom Explanation This book first introduces some simple knowledge and concepts of local area networks, and then introduces in detail the construction and configuration methods of several types of local area networks that are widely used at present. Introductory training, and hope to provide technical reference materials for the actual network erection and management office. ......)