Open System Interconnect (OSI) model
Open System Interconnect (OSI) is an International Organization for Standardization (ISO) layered architecture standard that defines a framework for implementing protocols in seven layers.
Note
A protocol is a communication standard that defines rules pertaining to syntax, semantics, and synchronization for communications.
The seven layers in the OSI model are represented as a top-down list in the following illustration:
Layers 7, 6, 5, and 4 work at the host (computer) level and are sometimes called host layers, whereas layers 3, 2, and 1 are related to transmission through the media and are called media layers:
- Layer 7: This is the application layer that provides application services that are required for application processes. Interaction between the user and the host application is facilitated in this layer. All functionalities in this layer are oriented toward applications.
- Layer 6: This is the presentation layer that manages the way information or data...
