"深入浅出:计算机网络介绍与基础知识解析"
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Chapter 1 of the computer network course titled "Introduction" aims to provide students with a solid understanding of the basic concepts and terminology of computer networks. The goal of this chapter is to lay the groundwork for more in-depth and detailed study in subsequent chapters. The approach taken is to use the Internet as an example to illustrate key principles. The chapter begins with an overview of the Internet, discussing its structure, functions, and purpose. It explores the concept of protocols and their role in facilitating communication and data exchange within a network. The chapter then delves into the network edge, covering topics such as end systems and access networks, as well as the physical media that enable connectivity. Furthermore, the chapter addresses the network core, including the principles of packet and circuit switching, as well as the architecture of the Internet. Performance considerations such as loss, delay, and throughput are also discussed in this section. The concept of protocol layers and service models are introduced, providing a framework for understanding how different components of a network interact and function together. While security is mentioned as a topic for self-study, the chapter also briefly touches on the history of computer networks and the evolution of the Internet. The roadmap for the chapter is laid out, with a clear delineation of the topics that will be covered in subsequent sections. Overall, Chapter 1 serves as a comprehensive introduction to the fundamentals of computer networks. It sets the foundation for a more in-depth exploration of network concepts, protocols, and technologies in the subsequent chapters of the course. Students are provided with a thorough understanding of the Internet and its underlying principles, as well as the essential components and functions of computer networks.
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