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What is OSI and it's role in computer networking?


OSI (Open Systems Interconnect) serves as a reference model for data communication. It is made up of 7 layers, with each layer defining a particular aspect on how network devices connect and communicate with one another. One layer may deal with the physical media used, while another layer dictates how data is actually transmitted across the network.

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Do you know what is the purpose of cables being shielded and having twisted pairs?Define DoS?