How does a subdomain relate to its parent domain?

How does a subdomain relate to its parent domain?

• A. A subdomain is a part of a larger domain, such as blog.example.com, where "blog" is the subdomain.
• B. A subdomain is a completely separate domain on a different top-level domain.
• C. A subdomain is the same as the root domain.
• D. A subdomain is a protocol for securing domains.

Answer: (A)

A subdomain is a subdivision of a single domain, created by adding a label to the left side of the domain name. In the example blog.example.com, blog is the subdomain and example.com is the parent domain. The DNS treats blog.example.com as part of the same domain family under the same top-level domain (.com), not as a completely separate domain on a different top-level domain. You can point the subdomain to its own server or service by setting its own DNS records, while still staying under the parent domain. This setup lets you organize different parts of a site—like a blog, a store, or an API—without registering a new domain.

A subdomain is a subdivision of a single domain, created by adding a label to the left side of the domain name. In the example blog.example.com, blog is the subdomain and example.com is the parent domain. The DNS treats blog.example.com as part of the same domain family under the same top-level domain (.com), not as a completely separate domain on a different top-level domain. You can point the subdomain to its own server or service by setting its own DNS records, while still staying under the parent domain. This setup lets you organize different parts of a site—like a blog, a store, or an API—without registering a new domain.