The DNS system is great because it means you don’t have to remember the IP addresses of all the web pages in the world. You do, however, have to remember the IP addresses of the DNS servers. For most people, this isn’t a problem because DNS is generally a set-and-forget kind of thing. So if your ISP’s DNS servers are something unmemorable like 184.108.40.206 and 220.127.116.11, it’s not a big deal. But if you’re an IT consultant and you’re frequently plugging in these numbers for troubleshooting purposes, it’s better to have a DNS server combination that you can keep in your head. We’ve used 18.104.22.168 and 22.214.171.124 for years, but now Google’s given us new options: 126.96.36.199 and 188.8.131.52.
I’m not recommending Google Public DNS as your permanent, default DNS servers … not yet, anyway. But I like having another option that I don’t have to write down.