<ul><li>The CAP Theorem is a fundamental rule in distributed systems that helps engineers make tough decisions about reliability and performance.</li><li>According to the CAP Theorem, in any distributed system, you can only guarantee two out of three properties: consistency, availability, or partition tolerance.</li><li>You can't have all three guarantees at once because networks are unreliable and failures are inevitable.</li><li>Engineers work around the CAP Theorem by using compromises like eventual consistency, read replicas, or multi-region databases.</li></ul>

Understanding the CAP Theorem in System Design

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