What are the basic principles for iso to divide network levels?

What are the basic principles for iso to divide network levels?

1) Each node in the network has the same level

2) Peer layers of different nodes have the same functions

3) Peer layers of different nodes implement communication between peer layers through protocols

4) Within the same node Adjacent layers communicate through interfaces

5) Each layer can use the services provided by the lower layer and provide services to its upper layer

Open System Interconnection Communication Reference Model (English: Open System Interconnection Reference Model (abbreviated as OSI), referred to as OSI model (OSI model), is a conceptual model proposed by the International Organization for Standardization, a standard framework that attempts to interconnect various computers into networks around the world. Defined in ISO/IEC 7498-1.

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