DNS Round Robin

ELI5 — The Vibe Check

DNS Round Robin is the simplest load balancing: one domain name, multiple IP addresses. DNS rotates through them for each request. Server A, then B, then C, then back to A. It's dumb — doesn't know if a server is down or overloaded — but it's free and requires zero infrastructure.

Real Talk

DNS round robin is a basic load distribution technique where multiple A/AAAA records are configured for a single domain, and the DNS server rotates the order for each query. It provides no health checking, session persistence, or load awareness. Often used as a simple first-layer distribution with proper load balancers behind it.

When You'll Hear This

"DNS round robin distributes initial traffic, but our ALB handles the actual load balancing." / "The problem with DNS round robin is it keeps sending traffic to dead servers."