Stage 1 · Lesson 1 of 7

Domains and DNS records

A is the name people type, such as example.com. You rent it yearly from a company called a registrar. (the Domain Name System) is the internet's address book: it says where that name points.

You will mostly touch four kinds of DNS records. An A record points the name at a server's number, its . A CNAME record points it at another name.

An MX record says which servers receive the domain's email. A TXT record holds text used to prove ownership and to protect email. To connect a client domain to WordPress hosting, Shopify or Webflow, you add exactly the records the platform lists.

Changes do not appear everywhere at once, because computers keep old answers for a while before asking again. Every launch depends on this, so learn it before any platform.

Common trapreplacing the whole (the full set of records) when moving a site and deleting the MX records, which silently breaks the client's email for days before anyone notices.

A question to check yourself, an AI practice session and 2 cheat sheet entries come with the full roadmap. Unlock

Resources for this stage

Start with· follow one of these

GuideFree
MDN Web Docs
Mozilla
Free, accurate learning area for HTML, CSS and how the web works; the reference every builder keeps open
GuideFree
W3Schools
W3Schools · Beginner
Short beginner examples of HTML and CSS you can edit in the browser straight away

Practise

Frontend Mentor
Free designs to rebuild in HTML and CSS, so you practise turning a mockup into a real page

Keep handy

Can I Use
Check whether a CSS feature works in the browsers your client's customers use

Also worth your time

web.devGo deeper
Google's guides on responsive design, images and performance for when the basics feel solid