05/20: TCP/IP vs OSI Model: The Ultimate Comparison
<h2> The Question Every Networking Student Eventually Asks </h2> <p>After learning the OSI Model, most students discover something surprising:</p> <p>The internet doesn't actually run on the OSI Model.</p> <p>Instead, modern networks operate using
Roboticela Posted on May 25 05/20: TCP/IP vs OSI Model: The Ultimate Comparison # osimodel # informationtechnology # softwareengineering # networking The Question Every Networking Student Eventually Asks After learning the OSI Model, most students discover something surprising: The internet doesn't actually run on the OSI Model. Instead, modern networks operate using the TCP/IP Model, a separate networking framework with only four layers. This often creates confusion. If TCP/IP powers the internet, why do networking courses, certification exams, and engineers spend so much time discussing OSI? The answer is that these models serve different purposes. One helps us understand networking. The other helps us build networking. To become comfortable with modern networks, you need to understand both. Two Models, One Goal Although they look different, both models attempt to solve the same problem: How can devices communicate reliably across a network? Both frameworks divide communication into layers, allowing protocols to focus on specific responsibilities without needing to understand every detail of the entire communication process. The difference lies in how those layers are organized and why the models were created. A Brief History The OSI Model The Open Systems Interconnection (OSI) Model was developed by the International Organization for Standardization (ISO) and formally published in 1984. Its purpose was to provide a universal reference framework for networking. Rather than describing specific protocols, it described the functions required for successful communication. The OSI Model was designed to be technology-neutral and educational. The TCP/IP Model The TCP/IP Model, sometimes called the Internet Model or DoD Model, emerged from networking research funded by the Defense Advanced Research Projects Agency (DARPA) during the development of ARPANET. Unlike OSI, TCP/IP was built around working protocols. TCP and IP already existed and were being used successfully be
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