Chapter 1, Problem 1RQ

Program Description Answer

In “mozilla.com”, “.com” is considered as the top-level domain, where as “Mozilla” is considered as the second-level domain name.

Hence, the correct answer is option “B”.

Explanation of Solution

URL:

• • URL is known as Uniform Resource Locator; it is also a type of Uniform Resource Indicator, because, it represents the network location of resources like web pages, graphic files, mp3 files, and so on.
• • URL contains:
  • ○ A protocol
  • ○ Web server name
  • ○ Domain name
  • ○ Location of the file

Example: “http://www.mozilla.com”

Here,

• • http – HTTP protocol
• • www – Web server name or host
• • mozilla.com – domain name

In “mozilla.com”: “.com” is considered as the top-level domain, because in the domain name “.com” is the right most part and “Mozilla” is considered as the second-level domain name.

Explanation for wrong answers:

“http”:

“http” is considered as the protocol and it is not a domain name.

Hence, the option “A” is wrong.

“mozilla”:

In “mozilla.com”: “.com” is considered as the top level domain whereas “Mozilla” is considered as the second-level domain name.

Hence, the option “C” is wrong.

“WWW”:

“www” is considered as a web server name or host and it is not a domain name.

Hence, the option “D” is wrong.