What are the four components of a domain name?

‌The four components of a domain name usually include a protocol prefix, a top-level domain name (TLD), a second-level domain name, and a subdomain name.

Here are the specific instructions:

‌Protocol prefix‌.

Located on the far left of the domain name, it is used to specify the type of protocol used when accessing (such as HTTP or HTTPS).

For example:

http:// or https://

‌Top-level domain name (TLD)‌.

Located on the far right of the domain name, it represents the country, region, or purpose. Common TLD types include:

‌Generic top-level domain names‌ (gTLDs): such as .com (commercial), .org (organization), .net (network service), etc.;

‌Country code top-level domain names‌ (ccTLDs): such as .cn (China), .uk (United Kingdom), etc.;

‌New generic top-level domain names‌ (NgTLDs): such as .blog, .vip, etc. ‌‌‌‌

‌Second-level domain name‌.

Located on the left of the TLD, it usually represents the name of an organization or company. For example, in example.com, "example" is the second-level domain name. ‌‌‌‌

Subdomain.

An additional part to the left of a second-level domain that further subdivides a service or department. For example, in blog.example.com, "blog" is a subdomain. ‌‌

‌Example:

Full URL: https://www.example.com

Protocol prefix: https://

TLD: .com

Second-level domain: example

Subdomain: www. ‌‌

Note that some sources may include "third-level domain" as a separate part, but strictly speaking, "www" is one of the common forms of subdomains. ‌‌‌‌