Both the OSI model and the TCP/IP model serve as frameworks for understanding how different aspects of network communication work together, but they do so in slightly different ways. The OSI model breaks down the communication process into 7 layers, each with its own specific function, while the TCP/IP model simplifies this into 4 layers.
I believe there are two models because they were developed by different organizations at different times and serve slightly different purposes. The OSI model was developed by the International Organization for Standardization (ISO) in the 1980s, while the TCP/IP model was developed by the Department of Defense in the 1970s. The OSI model was meant to be a universal standard for networking protocols, while the TCP/IP model was specifically designed for use in the ARPANET, the precursor to the internet.
While both models have their advantages and disadvantages, the TCP/IP model has become the de facto standard for internet communication due to its simplicity and widespread adoption. However, the OSI model is still used in certain industries and educational settings for its more detailed approach to networking concepts. Ultimately, having two models allows for a more comprehensive understanding of how network communication works.
Topic 1 ; In your own words, explain the difference between the OSI model and the TCP/IP model. Why do you think there are two models?
OSI stands for Open Systems Interconnection. It has 7 layers Physical layer, Data Link layer, Network layer, Transport layer, Session layer, Presentation layer, and Application layer. Each layer performs its task independently.
TCP/IP stands for Transmission Control Protocol/Internet Protocol. It has 4 layers named as Physical layer, Network layer, Transport layer, and Application layer. It also can be used as a communications protocol in a private computer network
These models have a few differences which include;
The OSI model has 7 layers whereas the TCP/IP has 4 layers
OSI is vertically approached while TCP/IP is horizontally approached
OSI is low in usage while TCP/IP is mostly used
In the OSI model, Delivery of the package is guaranteed whereas Delivery of the package is not guaranteed in the TCP/IP model
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