Domain Glossary
22 terms matching your filter
A Record
A DNS record that points a domain to an IPv4 address.
AAAA Record
A DNS record that maps a domain to an IPv6 address — the successor to the IPv4 A record.
CNAME Record
A DNS record that creates an alias from one domain name to another.
DKIM (DomainKeys Identified Mail)
An email authentication method using cryptographic signatures to verify email legitimacy.
DMARC
An email security policy that instructs receiving servers how to handle emails that fail SPF/DKIM checks.
DNS (Domain Name System)
The internet's phonebook — translates domain names into IP addresses.
DNS Propagation
The time it takes for DNS changes to spread across all servers globally, typically a few hours.
DNS Resolver
A server that performs recursive DNS lookups on behalf of client devices.
DNSSEC (DNS Security Extensions)
Cryptographic extensions that verify DNS records haven't been tampered with — protection against spoofing.
Glue Record
A special DNS record providing a nameserver's IP address when the nameserver is within the domain it serves.
HTTPS
The secure, encrypted version of HTTP — required for trust, SEO, and data security.
IP Address
The numerical address of a server or device on the internet that domain names resolve to.
MX Record
A DNS record that specifies which server handles email for a domain.
Nameserver
A server that stores and serves DNS records for a domain name.
Root Zone
The top of the DNS hierarchy listing all TLDs and their nameservers — managed by ICANN/IANA.
SOA Record (Start of Authority)
The first DNS record in a zone file — contains administrative data about the domain's DNS zone.
SPF Record
A DNS record that authorizes specific servers to send email for a domain — prevents spoofing.
SSL/TLS Certificate
A digital certificate that enables HTTPS encryption and verifies a website's identity.
TTL (Time to Live)
How long (in seconds) DNS resolvers should cache a record before refreshing it.
TXT Record
A DNS record used for verification, email authentication (SPF/DKIM/DMARC), and other text data.
Wildcard DNS
A DNS record using * to match any subdomain that doesn't have a specific record.
Zone File
The file on a nameserver containing all DNS records for a domain.