Build a clear understanding of the infrastructure that makes a WordPress website available online and learn how domains, DNS, hosting, and servers work together.
A WordPress website does not exist online simply because WordPress has been installed. Several infrastructure components must work together before visitors can reach and use the website.
Provides the human-readable address people use to find the website.
Directs the domain to the correct hosting services and other internet resources.
Provides the environment where the website files, databases, and services operate.
Processes requests and delivers website content to visitors’ browsers.
A domain name is the readable internet address people type into a browser to reach a website. Instead of remembering a server’s numerical IP address, visitors can use an address such as example.com.
example.com
The complete public address used to identify a website.
.com
The ending of the domain, commonly called the TLD.
courses.example.com
A separate address created under the main domain.
A domain is registered through a domain registrar. The registrar manages the registration record, renewal, nameserver settings, and ownership information.
Web hosting is the service that provides the computing environment needed to store and operate a website. A WordPress installation needs server resources, file storage, database services, networking, and other infrastructure.
Multiple websites share the resources of the same server. It is often affordable and beginner-friendly for smaller websites.
A virtual private server provides more isolated resources and greater control than typical shared hosting.
Website resources are delivered using distributed cloud infrastructure, which can provide flexibility and scalability.
Hosting configured specifically for WordPress, often including managed updates, backups, caching, security, and technical support.
A server is a computer or computing environment configured to provide resources and services to other computers over a network. In web hosting, the server receives requests from visitors and delivers website content in response.
Software such as Apache or Nginx handles incoming web requests and helps deliver pages.
WordPress stores structured information such as posts, settings, users, and metadata in a database, commonly MySQL or MariaDB.
WordPress uses PHP to execute application logic and generate dynamic page content.
The Domain Name System, commonly called DNS, translates human-readable domain names into technical destinations that computers can understand.
When someone visits a domain, DNS helps determine which server or service should receive the request.
Points a hostname to an IPv4 address.
@ → 192.0.2.10
Points one hostname to another hostname.
www → example.com
Identifies the mail servers responsible for receiving email for the domain.
Stores text-based verification, email authentication, and other configuration information.
Identify the DNS service that is authoritative for the domain’s DNS records.
Time To Live influences how long DNS information can remain cached before being refreshed.
When DNS settings are changed, different networks and resolvers may continue using cached information for a period of time. This is commonly referred to as DNS propagation. Changes may therefore not appear everywhere immediately.
When a visitor opens a WordPress website, several infrastructure steps happen behind the scenes.
| Component | Main Purpose | Where It Is Managed | Example | If It Fails |
|---|---|---|---|---|
| Domain | Provides the public website address. | Domain registrar. | example.com | Visitors may no longer be able to use the domain. |
| DNS | Directs domain requests to internet services. | DNS provider or nameserver provider. | A, CNAME, MX, TXT records. | Website or email services may become unreachable. |
| Hosting | Provides the environment where the website operates. | Hosting provider. | Shared hosting, VPS, cloud hosting. | The website may become unavailable or malfunction. |
| Server | Processes requests and serves application resources. | Hosting provider or server administrator. | Apache/Nginx server environment. | The website cannot respond normally to requests. |
A business registers the following domain:
example.comThe business then purchases a hosting account and installs WordPress. The hosting provider supplies either nameservers or a server IP address.
A domain is an address. Hosting provides the environment where the website operates.
This can unintentionally disrupt websites, email, or verification records.
A wrong IP address or hostname can direct visitors to the wrong destination.
Critical website services can become unavailable when subscriptions are not renewed.
Professional websites should normally use HTTPS to protect communication between browsers and servers.
Cheap hosting may not provide the reliability, resources, security, or support a project requires.
Select a website or domain that you are authorized to inspect and identify its basic infrastructure components. Do not make configuration changes during this activity.
Create a short document containing the domain, registrar, hosting provider, nameservers, important DNS records, SSL status, and any observations about the infrastructure.
Answer these questions before proceeding. The objective is to confirm that you understand the infrastructure concepts rather than simply memorizing definitions.
Now that you understand how domains, DNS, hosting, and servers work together, the next step is learning how to evaluate and select suitable domain and hosting solutions for a WordPress project.
Continue to Lesson 1.2 and learn how to choose the right domain and hosting environment for different WordPress website requirements.
Continue to Lesson 1.2 →