Narrate the End-to-End Request Path: DNS to Private Data Access
The end-to-end request path traces a browser request through DNS, ingress, and load balancing to a private database. This interactive lesson builds an interview narration that names the trust boundary and failure domain at every hop. Covers: DNS endpoint selection, health checks, private subnets, private database endpoints, reachability versus authorization, failure narration by boundary. Tools: Amazon Route 53, Application Load Balancer, Azure Front Door. Practice: Trace the Storefront Request Path. Prerequisites: TCP/IP basics and cloud virtual networks.
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In a design interview, a strong answer to “what happens when a customer opens the storefront?” combines a clear verbal path with a diagram that names each boundary. In this lesson, we build that narration for the storefront from browser to database. We won’t choose products by name until we can defend the request flow.
An interviewer interrupts the storefront design. “Talk me through exactly how a customer’s browser request becomes a database query. Where are the trust boundaries, and what breaks first?” Hold these assumptions constant. The synthetic seasonal storefront runs in one primary Region, serves public users through ...