When a user enters a domain into a browser, the DNS resolver looks for the A Record to determine where to send the request.
- Direct Mapping: It strictly connects a hostname (like bizpin.pro) to an IPv4 address (like 45.33.113.124).
- Subdomains: A Records are used to direct subdomains to different servers, such as pointing shop.bizpin.pro to one IP and demo.bizpin.pro to another.
- Redundancy: Multiple A Records can be created for a single domain to distribute traffic across several servers, though this requires careful synchronization to avoid connection issues.
During an audit, we verify that A Records are pointed specifically to a secured server rather than a generic parking page or a defunct host. Mismanaged A Records are a primary cause of site downtime. We ensure that these records have an appropriate TTL (Time to Live) so that if a server move is necessary, the transition happens without extended service interruption.