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SSCP® Systems Security Certified Practitioner All-in-One Exam Guide by Darril Gibson

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Comparing the OSI and TCP/IP Models

The TCP/IP Model was created by the Defense Advanced Research Projects Agency (DARPA). It has a similar goal as the OSI Model—to provide a common framework for connecting multiple computers together. However, different sources show this model as having either four or five layers. Additionally, different sources show these layers with different names. Figure 3-3 compares the four-layer and five-layer TCP/IP Models with the OSI Model.

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Figure 3-3 TCP/IP model compared to the OSI model

imageTIP The TCP/IP Model is also ...

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