I’ve compiled articles that seem helpful for understanding DNS (Domain Name Service) propagation.

・Geekなぺーじ:なぜ「DNSの浸透」は問題視されるのか (Geek Page: Why is “DNS Propagation” Considered Problematic?)

・「DNSの浸透待ち」は回避できる――ウェブ担当者のためのDNS基礎知識 -INTERNET Watch (“DNS Propagation Wait” Can Be Avoided - Basic DNS Knowledge for Web Managers - INTERNET Watch)

That’s all. (Will be updated as needed)

That’s all from the Gemba.