Distributed System · Medium
How do DNS caching and TTL (Time-to-Live) impact performance?
Distributed SystemDNSSenior
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DNS is the first hop in almost every request — resolution modes, caching, routing policies, and security are core interview topics. How do DNS caching and TTL (Time-to-Live) impact performance? — define the concept, explain how it works in production, and call out trade-offs and …