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Client-Server Architecture is assumed when working with web APIs, so we won't explore this. The Cacheability and Layered System constraints are generally handled through intermediary devices between the client and the server as a way of improving performance and reliability, so we won't explore these either. Finally, Code on Demand is an optional constraint that is only useful in environment environments where the client and the server are tightly controlled. Therefore we'll skip over this as well.
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