AWS Route 53 — DNS Fundamentals, Hosted Zones, Routing Policies & Resolvers

Part of my AWS learning journey — transitioning from Systems Engineer to Cloud/DevOps. Route 53 is where networking meets the internet — how domain names reach your applications, how traffic gets distributed intelligently, and how AWS and on-premises networks resolve each other's names. 📋 Topics Covered # Topic Type 1 DNS Pre-Requisites — How DNS Works Concept 2 Complete DNS Resolution Flow Concept + Interview 3 What is Route 53 Concept 4 Hosted Zones — Public vs Private Concept + Lab 5 Hosted Zone ID Concept + DevOps 6 DNS Record Types and Use Cases Concept + Cert 7 NS and SOA Records — Auto-Created, Never Delete Concept + Interview 8 Alias Record — AWS-Specific Concept + Cert 9 Landing Zone — Brief Context Concept 10 Route 53 Routing Policies — All 8 Concept + Cert 11 Route 53 Traffic Policies Concept + DevOps 12 Route 53 Resolvers Concept + Interview 13 Inbound vs Outbound Resolver Endpoints Concept + Interview 14 Route 53 Forwarders Concept + Interview 15 Split-Horizon DNS Concept + Interview 16 Interview Questions Interview 17 Practice Tasks Practice DNS Pre-Requisites — How DNS Works DNS is the reason you type google.com instead of 142.250.195.46 . Before understanding Route 53, these fundamentals must be solid. Core Vocabulary Term What it means Domain Human-readable name — google.com , tejascloud.in IP Address Machine address — 54.21.11.90 — what computers actually use DNS The translation system — converts domain names → IP addresses TLD Top-Level Domain — the last part after the final dot TTL Time To Live — how long a DNS response is cached before re-querying Recursive Resolver Finds the answer for the client by querying other DNS servers, caches the result Authoritative DNS Server Stores the official DNS records for a domain — returns the definitive answer Common TLDs: .com → commercial · .org → organizations · .net → network · .in → India · .uk → United Kingdom · .edu → education · .gov → government The Complete DNS Resolution Flow This is the full journe