DATA COMMUNICATIONS MODELS
A model refers to
an abstract representation or framework that describes the process of
communication between two or more devices or systems.
It helps to understand,
design, and implement communication systems effectively.
The two most
common models used in data communications, are:
1. OSI Model (Open
Systems Interconnection Model):
- The OSI model is a conceptual framework
that standardizes the functions of a telecommunication or computing system into
seven distinct layers.
- Each layer in the OSI model represents a
specific function that facilitates communication between devices.
- The seven layers of the OSI model are Physical, Data Link, Network, Transport, Session, Presentation, and
Application.
2. TCP/IP Model
(Transmission Control Protocol/Internet Protocol Model):
- The TCP/IP model is a concise version of
the OSI model and is widely used for internet communication.
- It consists of four layers: Application,
Transport, Internet, and Link.
- The TCP/IP model's layers correspond
roughly to the layers of the OSI model, but they are not a perfect match.
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