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Network on a chip is a concept in which a single silicon chip is used to implement the communication features of large-scale to very large-scale integration systems. In the case of large-scale designs, network on a chip is preferred as it reduces the complexity involved in designing the wires and also provides a well-controlled structure capable of better power, speed and reliability. For high-end system-on-chip designs, network on a chip is considered the best integrated solution.
Network on a chip is designed in such a way that messages can flow from the source module to the destination module via several links that involve routing decisions at switches. It has multiple point-to-point data links that are interconnected by switches. It can be classified as a homogeneous switched fabric network, which is scalable.
Network on a chip has the following features: