DNS (Domain Name System)
The Domain Name System (DNS) is the internet's phone book: it translates human-readable domain names like btech-solutions.eu into numeric IP addresses that servers actually use. Without DNS, every website would only be reachable via cryptic number strings. DNS is the invisible foundation of web accessibility — and has direct impact on load times, email delivery, and SSL Certificate validation.
Why DNS matters for websites
Every browser request starts with a DNS lookup. Slow or misconfigured DNS delays the initial connection and degrades Load Time . Key DNS record types: A (IPv4), AAAA (IPv6), CNAME (alias), MX (email), TXT (verification, SPF/DKIM). Especially important when switching Hosting providers: TTL (Time to Live) values determine how long DNS responses are cached — lower them 48h before migration to minimize downtime.
Common DNS mistakes at website launch
The most common mistake: not reducing TTL values before a domain migration — leading to hours of downtime. Other issues: missing HTTPS redirects after SSL Certificate activation, incorrect MX records breaking email delivery, and missing SPF/DKIM TXT records causing emails to be flagged as spam.
How we handle DNS at BTECH Solutions
For every website launch we verify TTL values early and reduce them 48 hours before go-live. All projects receive correct A-records, CNAME entries for www-redirect, and TXT records for SPF, DKIM, and domain verification. DNS configuration is part of our Deployment checklist — alongside SSL Certificate activation and redirect validation.