What Is Osi Model Layers?
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The OSI (Open System Interconnection) Model is a conceptual model that defines computer networking. It was established by the International Organization for Standardization (ISO) in 1984 as a way to standardize communication between different devices. The OSI Model is made up of 7 layers:
1. Physical Layer: transmits bits over physical media links
2. Data Link Layer: responsible for node–to–node data transfer
3. Network Layer: responsible for routing packets from one node to another
4. Transport Layer: responsible for end–to–end error checking and flow control
5. Session Layer: manages dialogs between applications such as directory services, authentication, and other network services
6. Presentation Layer: formats and translates data for higher layers
7. Application Layer: provides user–application interfaces such as database access and file transfer