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Editor to share with you which layer of the osi router in the computer network, I believe most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

The router is at the third layer of OSI, the network layer. OSI divides the work of network communication into seven layers, namely, physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer. The purpose of the network layer is to realize the transparent transmission of data between the two end systems, including addressing and routing, connection establishment, maintenance and termination.

Routers belong to the third layer of the OSI architecture, the network layer.

OSI architecture, which means open systems interconnection. The International Organization for Standardization (ISO) has developed the OSI model. This model divides the work of network communication into seven layers, namely physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer. Layers 1 to 4 are considered lower layers, and these layers are closely related to data movement. Layers 5 to 7 are high-level and contain application-level data. Each layer is responsible for a specific task, and then transfers the data to the next layer.

OSI divides the computer network architecture (architecture) into the following seven layers:

Physical layer: converting data into electronic signals that can be transmitted through a physical medium is equivalent to a porter in a post office.

Data link layer: determines how the network media is accessed.

In this layer, the data is framed and the flow control is handled. This layer specifies the topology and provides hardware addressing, which is equivalent to the packing and unpacking workers in the post office.

Network layer: the right to use data is routed through a large network equivalent to a sorting worker in a post office.

Transport layer: providing a reliable terminal-to-terminal connection is equivalent to a messenger who runs a post office in a company.

Conversation layer: allows users to establish a connection with an easy-to-remember name equivalent to the secretary in the company who receives and sends letters, writes envelopes, and opens envelopes.

Presentation layer: the negotiation data exchange format is equivalent to the presentation boss and the assistant who writes for the boss in the company.

Application layer: the interface between the user's application and the network.

Network layer

The network layer is the third layer of the OSI reference model, between the transport layer and the data link layer. It further manages the data communication in the network on the function of transmitting data frames between two adjacent endpoints provided by the data link layer, and transmits data from the source to the destination through several intermediate nodes, thus providing the most basic end-to-end data transmission service to the transport layer. The main contents include: virtual circuit packet switching and Datagram packet switching, routing algorithm, congestion control method, X.25 protocol, integrated service data network (ISDN), asynchronous transfer mode (ATM) and internetwork interconnection principle and implementation.

The purpose of the network layer is to achieve transparent data transmission between the two end systems, including addressing and routing, connection establishment, maintenance and termination, and so on. It provides services so that the transport layer does not need to know about data transmission and switching technologies in the network.

The above is all the contents of the article "which layer of the osi is the router in the computer network". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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