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The Least You Need to Know

Right now, the least you need to know about the Internet, intranets, and extranets is this:

  • All three types of networks (the Internet, intranets, and extranets) are based on TCP/IP protocols and naming conventions.

  • The domain name system (DNS) and IP addresses are used to identify host computers and other network resources in each type of network.

  • The World Wide Web made the Internet accessible to the general population.

  • Some older Internet applications, such as email and newsgroups, are still popular today. Older document search and storage methods, such as Gopher, Archie, and WAIS, are becoming obsolete.

  • The uses of the Internet are too numerous to describe; some popular uses include online shopping, online gaming, Internet searching, news access, and online chats.

  • Intranets are closed networks that use the same protocols and addressing style used by the Internet.

  • Extranets are networks that are maintained by a company, but extend beyond the physical boundaries of the private network so partners and suppliers can access some level of information from that network.

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