DNS-related service tickets are common in any helpdesk. Some of them can be easily fixed with simple DNS flush (ipconfig /flushdns), and some may require DNS server level troubleshooting. Even if the DNS issues are small or critical, it is important to know how DNS works in order to troubleshoot any DNS-related issue.
A few days ago, I posted a birthday card to my mother, who lives in Sri Lanka. I posted it from the local post office in Kingston upon Thames, England. Once I put it inside the post box, the delivery process started, and now it was the postal service's responsibility to deliver it to the correct person. So, the local post office worker who picked up my letter, did he/she know my parents' house location exactly? No, they don't, but at the end of my address, it said the country was Sri Lanka. They then knew that if this letter goes to Sri...
