DNS-based Service Discovery:?

Short answer: Use DNS-based service discovery (e.g., AWS Route 53, Consul DNS integration) that supports multi-region failover, routing users to the nearest region based on the DNS resolution.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.