Ever wondered how top-tier applications manage global traffic seamlessly? It all starts at the DNS layer. As shown in the excellent breakdown in ⁠image.png⁠, choosing the right Cloud DNS Routing Policy is critical for balancing performance, cost, and availability. Here is a quick cheat sheet on the 6 essential routing types every tech professional should know: 1. Simple Routing How it works: Maps a domain directly to a single resource (e.g., one web server or load balancer). Best for: Small-scale applications or single-resource setups where 100% of traffic goes to one place. 2. Weighted Routing How it works: Distributes traffic across multiple resources based on predefined percentages (e.g., 70% to App A, 30% to App B). Best for: Safe canary deployments, blue-green testing, or gradual system upgrades. 3. Failover Routing How it works: Directs traffic to a designated Primary application. If health checks fail, it automatically diverts traffic to the Failover backup. Best for: Active-passive disaster recovery (DR) strategies. 4. Latency-Based Routing How it works: Routes users to the AWS/Cloud region that provides the lowest network latency (fastest response time) for their specific location. Best for: Global applications where user experience and speed are the top priorities. 5. Geolocation Routing How it works: Directs traffic based on the geographic location of the user (e.g., European users land on European servers), with a "Default" region fallback. Best for: Content localization, regional restrictions, and compliance (like GDPR). 6. Geoproximity Routing How it works: Routes traffic based on the physical distance between users and resources. Crucially, it allows you to shift traffic dynamically using a "Bias" value to expand or shrink a region's footprint. Best for: Sophisticated global traffic management and fine-grained resource control. 💡 Which DNS routing policy are you currently leveraging for your architecture? Let's discuss in the comments! #CloudComputing #SystemDesign #DevOps #AWS #Networking - @itlandytech