The Internet is generally defined as a global network connecting millions of computers. More than 190 countries are linked into exchanges of data, news and opinions.
Interanet:
An intranet is a private network contained within an enterprise ( کاروباری مہم) that is used to securely share company information and computing resources among employees. An intranet can also be used to facilitate working in groups
Extranet:
An extranet is a controlled private network allowing customers, partners,suppliers and other businesses to gain information, typically about a specific company or educational institution, and do so without granting access to the organization's entire(پوری) network.
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