Which option is a subdomain?

Which option is a subdomain?

• A. cars.about.com
• B. about.com/cars
• C. about.com
• D. com/cars

Answer: (A)

Subdomains are the part of a URL that appears before the main domain, creating a separate host under the same domain. In this example, cars.about.com has "cars" before the main domain "about.com," making it a subdomain of about.com. The other forms show either a path on the main domain (about.com/cars), the main domain by itself (about.com), or a different domain structure (com/cars) that isn’t a subdomain of about.com.

Subdomains are the part of a URL that appears before the main domain, creating a separate host under the same domain. In this example, cars.about.com has "cars" before the main domain "about.com," making it a subdomain of about.com. The other forms show either a path on the main domain (about.com/cars), the main domain by itself (about.com), or a different domain structure (com/cars) that isn’t a subdomain of about.com.