"深入理解计算机网络数据链路层技术及实现方法"
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Chapter 5 of the computer network course focuses on the Data Link Layer, which is responsible for providing a reliable communication link between nodes in a network. The goals of this chapter include understanding the principles behind data link layer services such as error detection, correction, sharing a broadcast channel, link layer addressing, reliable data transfer, and flow control.
The Data Link Layer performs key functions to ensure the efficient and secure transmission of data. It is responsible for detecting and correcting errors that may occur during data transmission. Additionally, it manages access to a shared network channel through multiple access protocols, ensuring that data is sent and received efficiently.
Link layer addressing is another important aspect of the Data Link Layer, allowing nodes on a network to be uniquely identified. This enables the proper routing of data packets and ensures that they reach their intended destination.
One of the key technologies discussed in this chapter is Ethernet, a widely used protocol for local area networks. Ethernet defines the rules for how data is transmitted over a network, including the format of data frames and the methods for handling collisions and data retransmission.
Overall, Chapter 5 provides a comprehensive overview of the Data Link Layer and the various technologies and protocols that are used to facilitate communication between devices on a network. By understanding the principles and functions of the Data Link Layer, students can gain a deeper insight into how data is transmitted and received in a networked environment.
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