#DNS

DNS (Domain Name System) translates domain names into the records that computers need, such as IP addresses, mail servers and verification strings. Many website and e-mail problems start with a missing, duplicated or outdated DNS record. Record types such as A, CNAME, MX and TXT each have a specific role and their own rules. Changes spread according to the record’s TTL, so planning matters when moving hosts or providers. The articles under this tag explain DNS records in practical terms and show how to avoid common mistakes.