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What is the internet

What is the internet. a network of networks based on the TCP/IP protocols, * a community of people who use and develop those networks, * a collection of resources that can be reached from those networks. The internet began as an experiment 20 years ago by the U.S. Department of Defense.

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What is the internet

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  1. What is the internet

  2. a network of networks based on the TCP/IP protocols, • * a community of people who use and develop those networks, • * a collection of resources that can be reached from those networks.

  3. The internet began as an experiment 20 years ago by the U.S. Department of Defense. • The ARPAnet was an experimental network designed to support military research--in particular, research about how to build networks that could withstand partial outages (like bomb attacks) and still function.

  4. The network was designed for a computer to put its data in an envelope, called an Internet Protocol (IP) packet, and "address" the packets correctly. • The communicating computers--not the network itself--were also given the responsibility to ensure that the communication was accomplished.

  5. Ethernet local area networks ("LANs") were developed around 1983. • These workstations came with Berkeley UNIX, which included IP networking software creating a demand for the network.

  6. Central Hubs • NSF build its own network, based on the ARPAnet's IP technology. • 5 super computer centers connected with 56,000 bit per second (56k bps) telephone lines. (This is roughly the ability to transfer two full typewritten pages per second. • Because you pay telephone lines by the mile each university was connected to a regional network with a supercomputer, and each super computer connected together. • With this configuration, any computer could communicate with any other by forwarding the conversation through its neighbors.

  7. Who Governs the Internet? • The ultimate authority is the Internet Society, or ISOC. • ISOC is a voluntary membership organization whose purpose is to promote global information exchange through Internet technology.

  8. Who Pays for It? • No one pays for "it"; there is no Internet, Inc. that collects fees from all Internet networks or users. • Everyone pays for their part. • The NSF pays for NSFNET. • NASA pays for the NASA Science Internet. • Networks get together and decide how to connect themselves together and fund these interconnections.

  9. A college or corporation pays for their connection to some regional network, which in turn pays a national provider for its access. • NMSU and service providers have DSO lines to the internet • DS0 - 64 kilobits per second is a phone company fiber optic line that caries data

  10. The local area network using radio link run as 48 mpbs at 32 bits • 672 local area lines per DS0 line. • Current servers can run 64 bit packets but windows xp is a 32 bit machine. • Phone companies would like to charge by bitts transmitted instead of a fixed cost. • This is being resisted by the scientific and private users.

  11. Source of information • http://www.nmia.com/docs/what_is_the_internet.txt

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