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Concept explainers
In the given Uniform Resource Locator (URL) “http://google.com”, the “.com” is considered as the top-level domain, where as the “google” is considered as the second-level domain name.
Hence, the correct answer is option “B”.
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Explanation of Solution
Uniform Resource Locator (URL):
The Uniform Resource Locator 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.
- An URL contains:
- A protocol.
- Web server name or subdomain.
- Domain name.
- Location of the file.
Given that,
“http://www.google.com”
Explanation:
Here,
- http – HTTP protocol.
- www – Web server name or subdomain.
- google.com – domain name.
A domain name can be categorized into two level, they are top-level domain and second-level domain.
- The top-level domain is the extension of domain name.
- That is, “google.com” is a domain name.
- Here, “.com” is the extension of domain name; so, “.com” is considered as top-level domain.
- The second-level domain is before to the top-level domain and it is the name of website.
- That is, “google.com” is a domain name.
- Here, “google” is the name of the website; so, “google” is considered as second-level domain.
Therefore, “.com” will be the top-level domain name.
Explanation for incorrect options:
“http”:
“http” is considered as the protocol and it is not a domain name.
Hence, the option “A” is wrong.
“google”:
In “google.com”, “.com” is considered as the top level domain whereas “google” is considered as the second-level domain name.
Hence, the option “C” is wrong.
“WWW”:
The “www” is considered as a web server name or host and it is not a domain name.
Hence, the option “D” is wrong.
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