Here is a second article of a series covering some important aspects about the DNS protocol to troubleshoot applications performance issues.
For various reasons (size of database, performance, redundancy, security), when trying to translate a FQDN (Fully Qualified Domain Name) into an IP address, a single DNS server cannot answer all requests by itself. To do that on his own, it would have to store all FQDNs defined worldwide and be able to handle all requests !
Here is a first article of a series covering some important aspects to know about the DNS protocol when troubleshooting applications performance issues.
First of all, let’s have a look at the DNS protocol itself.