0 Preface
The online arena is like a thousand-year-old martial arts forest, carrying culture and traditions passed down from generation to generation. In this vast arena, the data link layer is like a martial arts school, passing down the essence of network communications from generation to generation. This part will lead us to deeply explore the protocols and inheritance of the data link layer, revealing its wonderful story in the network arena.
Just like warriors in the martial arts world need basic kung fu as the foundation for their practice, the data link layer also has its basic components. The structure of the frame, like moves in martial arts, forms the basis of data link layer communication. At the same time, various identity markers are also needed in the network arena to identify the strong men and sects in the arena, and MAC addresses play this important role. We'll dive into these elements to give you a peek inside the data link layer.
The data link layer not only has basic skills, but also has various inheritance protocols. The Ethernet protocol, like the classic martial arts school in Jianghu, realizes data transmission within the local area network. Its heritage and characteristics will be revealed in this part, allowing you to better understand the essence of the Ethernet protocol.
In the arena, some masters are good at using stealth and clone techniques to protect themselves or complete tasks. In the network arena, VLAN and virtualization technologies are like these mysterious techniques that can divide a physical network into multiple logical networks, providing more security and flexibility. We will deeply study the application of these technologies and present to you their wonderful performance in the network arena.
Through the discussion in this part, we will have a deeper understanding of the protocols and inheritance of the data link layer, and reveal its indispensable position and role in the network world. Just like the martial arts inheritance in the arena, the data link layer carries the foundation of network communication and provides a solid foundation for the prosperity and development of the network arena.
1. Frame structure and MAC address
One of the core tasks of the data link layer is to encapsulate data into frames for transmission across the network. Frame is the basic unit of data link layer communication. Just like the moves of a martial artist, they have a specific structure and format. Let’s dive into the structure of a frame and explore the role of MAC address in it, these concepts