TLD (Top-Level Domain) — The last segment of a domain name, such as .com, .org, or .io.

ccTLD (Country Code Top-Level Domain) — A two-letter TLD assigned to a specific country, like .uk, .de, or .jp.

gTLD (Generic Top-Level Domain) — A category of TLDs not tied to any country, like .com, .org, .net, and newer ones like .app.

Domain Name — A human-readable address used to access a website, like google.com.

Domain Hack — A domain name that uses the TLD as part of the word, like del.icio.us or instagr.am.

DNS (Domain Name System) — The internet's phone book that translates domain names into IP addresses.

Domain Registrar — A company authorized to sell and manage domain name registrations.

Subdomain — A prefix added to a domain name to create a separate section, like blog.example.com.

Domain Extension — Another term for TLD — the suffix of a domain like .com, .io, or .store.

WHOIS — A protocol for querying databases that store registered domain ownership information.

Brandable Domain — A unique, invented or creative domain name designed for strong brand identity.

New gTLD — Domain extensions introduced after 2012 like .app, .dev, .xyz, and .store.

Domain Privacy — A service that hides your personal info from public WHOIS lookups.

Nameserver — A server that translates domain names into IP addresses as part of the DNS system.

IP Address — A numerical label assigned to each device connected to a network, like 192.168.1.1.

SSL Certificate — A digital certificate that enables HTTPS encryption between a browser and server.

HTTPS — The secure version of HTTP that encrypts data between browser and server.

Domain Parking — Registering a domain without attaching it to a website, often displaying ads instead.

Domain Flipping — Buying domain names at a low price and reselling them for a profit.

Premium Domain — A high-value domain name priced above standard registration due to desirability.

EMD (Exact Match Domain) — A domain that exactly matches a search query, like cheapflights.com.

Domain Transfer — Moving a domain's management from one registrar to another.

EPP Code (Auth Code) — A secret code required to authorize a domain transfer between registrars.

Domain Expiration — When a domain registration period ends and the domain becomes available for others.

DNS Propagation — The time it takes for DNS changes to spread across all servers worldwide.

TTL (Time to Live) — A DNS setting that controls how long a record is cached before being refreshed.

A Record — A DNS record that maps a domain name to an IPv4 address.

AAAA Record — A DNS record that maps a domain name to an IPv6 address.

CNAME Record — A DNS record that creates an alias from one domain name to another.

MX Record — A DNS record that specifies the mail server responsible for receiving email.

TXT Record — A DNS record that holds text information for domain verification and email security.

SPF (Sender Policy Framework) — An email authentication method that prevents spoofing by verifying sender servers.

DKIM (DomainKeys Identified Mail) — An email authentication method that uses digital signatures to verify message integrity.

DMARC (Domain-based Message Authentication) — An email policy that builds on SPF and DKIM to prevent domain spoofing.

Domain Forwarding — Redirecting visitors from one domain to another automatically.

301 Redirect — A permanent redirect that passes SEO value from the old URL to the new one.

302 Redirect — A temporary redirect that doesn't pass full SEO value to the new URL.

Domain Auction — A marketplace where registered domains are sold to the highest bidder.

Domain Squatting (Cybersquatting) — Registering domains matching trademarks with intent to profit from the brand owner.

Typosquatting — Registering misspelled versions of popular domains to capture mistyped traffic.

UDRP (Uniform Domain-Name Dispute Resolution) — ICANN's process for resolving domain name trademark disputes.

ICANN — The nonprofit organization that coordinates the internet's domain name system.

Domain Registry — The organization that maintains the master database of all domains in a TLD.

SLD (Second-Level Domain) — The part of a domain name directly to the left of the TLD, like 'google' in google.com.

Wildcard DNS — A DNS record that matches requests for non-existent subdomains.

Domain Age — How long a domain has been registered, which can influence search engine trust.

Domain Authority — A score predicting how likely a domain is to rank in search results.

IDN (Internationalized Domain Name) — A domain name that contains non-ASCII characters like Arabic, Chinese, or Cyrillic.

DNS Zone — A portion of the DNS namespace managed by a specific organization.

CDN (Content Delivery Network) — A network of servers that delivers web content faster based on user location.

Reverse DNS (rDNS) — Looking up the domain name associated with an IP address.

Domain Lifecycle — The stages a domain goes through from registration to deletion.

Email Hosting — A service that runs email servers for your custom domain email addresses.

Parked Domain — An additional domain that points to the same website as your primary domain.

Vanity URL — A custom, branded short URL that's memorable and easy to share.

Catch-All Email — An email configuration that receives messages sent to any address at your domain.