CCNA 1.1: Compare and contrast OSI and TCP/IP models (FREE LAB!)

Overview: Both the OSI model and the TCP/IP model are general-purpose conceptual models that assist in discussing how computers communicate with each other. In the 1960’s, the U.S. Department of Defense awarded contracts to develop packet switching networks. One of those contracts led to the development of the ARPANET by DARPA (Defense Advanced Research Project […]

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