What Is DNS? Domain Name System Explained for Beginners

DNS Explained With a Phonebook Analogy

DNS is the internet's phonebook — it turns names you remember into numbers computers dial.

• A record: points yourdomain.com at your server's IP address.

• CNAME: aliases one name to another (www → root).

• MX: tells the world which server receives your mail.

• TXT: holds verification strings for SPF, DKIM and site ownership.

• TTL: how long resolvers may cache an answer before re-asking.

Because resolvers worldwide cache answers, changes propagate over minutes to 48 hours. Check any domain live with our DNS record checker, or register a name on the domain registration India hub.

What Happens When Someone Opens Your Site

On DNS, the honest summary is that defaults matter more than brand names — a well-set budget plan outranks a mis-tuned premium one. WebJi® documents its defaults openly and adjusts them per ticket when workloads need it.

The 6 DNS Records Every Owner Should Know

How this plays out with A record: settings that look cosmetic usually decide page speed and uptime under real traffic. The defaults WebJi® ships are tuned for Indian network conditions, and support can review your setup on request.

Nameservers vs DNS Records vs Registrar

How this plays out with AAAA record: settings that look cosmetic usually decide page speed and uptime under real traffic. The defaults WebJi® ships are tuned for Indian network conditions, and support can review your setup on request.

TTL and Propagation: Why Changes Take Time

TTL is how long a resolver may cache a DNS answer. After an edit, people who cached the old record keep it until that timer ends, so the change can look instant for you and old everywhere else. Drop the TTL a day before a migration, make the change, and raise the TTL once you have confirmed the new target.

How to Check Your DNS With Free Tools

Set the nameservers at the registrar, then edit records only in the DNS host those nameservers point at. Editing the other panel does nothing. A website and its mail can use different hosts: the A record sends the site, MX sends the mail.

Common DNS Mistakes That Take Sites Down

Five mistakes cause most outages. First, editing the A record after a migration but leaving the old host's nameservers authoritative — traffic never moves. Second, deleting MX records with the old hosting plan, so mail bounces while the website works fine. Third, leaving TTL at 3600+ before a planned switch, which stretches propagation for every cached resolver.

Fourth, trying a CNAME on the root domain, which the protocol forbids and which some panels silently misapply. Fifth, letting the domain itself expire — DNS dies with it, whatever your records say. Each is checkable in minutes with dig or a web DNS lookup before and after any change.