GeoDNS
ELI5 — The Vibe Check
GeoDNS answers DNS queries differently based on where the user is. User in Europe? Here's the European server IP. User in Asia? Here's the Asian one. It's like a GPS for DNS — it knows where you are and gives you directions to the nearest entrance. Simple concept, powerful for global applications.
Real Talk
GeoDNS (Geographic DNS) is a DNS resolution technique that returns different IP addresses based on the geographic location of the requesting client. It uses the source IP of DNS resolvers or EDNS Client Subnet information to determine location. It's used for latency-based routing, regulatory compliance, and directing users to region-specific content.
When You'll Hear This
"GeoDNS routes European users to our Frankfurt cluster automatically." / "We use GeoDNS combined with health checks for automatic regional failover."
Related Terms
DNS (Domain Name System)
DNS is the internet's phonebook. You type 'google.
Latency-Based Routing
Latency-based routing sends users to whichever server responds fastest, not just the nearest.
Load Balancer
A load balancer is like a traffic cop for servers.
Route 53
Route 53 is Amazon's DNS service — it translates domain names like 'myapp.com' into IP addresses so browsers can find your server.