OSI is proposed by which organization

Proposed by the International Organization for Standardization.

Open Systems Interconnection Communications Reference Model, abbreviated as OSI model (OSI model), a conceptual model proposed by the International Organization for Standardization (ISO), a standard framework that attempts to interconnect a variety of computers into networks worldwide. It is defined in ISO/IEC 7498-1.

It has three basic functions: to provide developers with a necessary, generalized concept for developing a sound, interpretable framework for connecting different systems.

Expanded Information:

Design Purpose

The OSI model was designed to be an open network model that could be implemented by all vendors to overcome the difficulties and inefficiencies associated with the use of the many private network models.OSI was accomplished with the participation of a respected international standards group, the ISO (International Organization for Standardization).

What is OSI, OSI stands for Open System Interconnection, meaning Open System Interconnection Reference Model. Before the advent of OSI.

Numerous architectures exist in computer networks, with IBM's SNA (Systems Network Architecture) and DEC's DNA (Digital Network Architecture.

Digital Network Architecture) being the most famous.

Digital Network Architecture. In order to solve the problem of interconnecting networks with different architectures, the International Organization for Standardization ISO (careful not to confuse it with OSI) developed the Open System Interconnection Reference Model (OSI/RM) in 1981.

This model divides the work of network communication into seven layers, which are, from low to high, the physical layer (Physical Layer), the data link layer (Data Link Layer), and the network layer (Network Layer).

The Transport Layer, Session Layer, Presentation Layer and Application Layer.

Layers one through three belong to the lower three layers of the OSI reference model and are responsible for creating links for network communication connections; layers five through seven are the higher three layers of the OSI reference model and are specifically responsible for end-to-end data communications; and layer four is responsible for the connections between the higher and lower layers.

Each layer accomplishes a certain function, each layer directly serves its parent layer, and all layers support each other, while network communication can occur in both directions, either top-down (at the sending end) or bottom-up (at the receiving end).

Not every communication needs to go through all seven OSI layers, of course, and some may even need only one of the layers that correspond to both sides.

Transfers between physical interfaces and repeater-to-repeater connections can be made only in the physical layer, while router-to-router connections can go through only three layers below the network layer.

In general, communication between the two sides takes place at the peer-to-peer level and cannot take place at the asymmetric level.

Baidu Encyclopedia-OSI Model