The term “host” is used in several contexts, in each of which it has a slightly different meaning:

In Internet protocol specifications, the term “host” means any computer that has full two-way access to other computers on the Internet.
For companies or individuals with a Web site, a host is a computer with a Web server that serves the pages for one or more Web sites. A host can also be the company that provides that service, which is known as hosting.

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