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Uses Of Internet PPT: Definition and Uses

Uses Of Internet PPT: Definition and Uses Free Download: The Internet, sometimes referred to as in reality “the Net,” is a global device of pc networks — a community of networks wherein customers at any individual pc can, in the event that they have permission, get facts from another computer (and from time to time communicate immediately to customers at different computers).

The Internet is a worldwide networking device that may be used on maximum gadgets these days and has grow to be an crucial a part of our lives. In latest technological era, maximum of the agencies have become their operations performed over the Internet. There are diverse makes use of of the Internet via way of means of which agencies and people are making their every day responsibilities extra effective and extra comfortable.

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• Uses of Internet

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Application of the Internet

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History of the internet

Oct 04, 2010

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History of the internet who created the internet? when did it start? why? how did it evolve? why do we care? how does it work? what does it take to get access to it? who started it, and why? the U. S. Department of Defense Defense Advanced Research Projects Agency (DARPA)

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• international connections
• backup power
• public participation
• us defense data network
• domain name system
• email domain

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History of the internet nethistory.ppt

who created the internet? • when did it start? • why? • how did it evolve? • why do we care? • how does it work? • what does it take to get access to it? nethistory.ppt

who started it, and why? • the U. S. Department of Defense • Defense Advanced Research Projects Agency (DARPA) • began ~1962 in reaction to the Soviet Union's launch of Sputnik in 1957 • DARPA was told to find ways to utilize the nation’s investment in computers • funding for projects that might provide dramatic advances for military • timeframe of research could be 5 years or longer • formed with an emphasis towards basic computing research • was not oriented only to military products • eventually, DARPA settled on computer networking as a main goal nethistory.ppt

it didn’t happen all at once • 1969 • ARPANET commissioned by DoD for research into networking • 1971 • 15 nodes (23 hosts) networked for the first time • used NCP (network control protocol) to allow computers to communicate UCLA, SRI, UCSB, Univ of Utah, BBN, MIT, RAND, SDC, Harvard, Lincoln Lab, Stanford, UIU(C), CWRU, CMU, NASA/Ames • 1972 • the first e-mail program was created by Ray Tomlinson of BBN • 1973 • first international connections to the ARPANET • University College of London (England) via NORSAR (Norway) • development began on the protocol later to be called TCP/IP • (collaboration between Stanford and DARPA) • 1974 • first use of term internet in a paper on Transmission Control Protocol • 1976 • Elizabeth II, Queen of the United Kingdom, sends her first email nethistory.ppt

how did the network evolve? • ARPA’s created the first network • ARPA did not act as an enforcer on standards, but instead, invited public participation in improving the network • the founding philosophy: • to be resilient, the network was not supposed to rely on a centralized control • this was revolutionary • the network relied on a growing number of standard specification documents • only standards-compliant computers could communicate • ARPA retained “control” but exercised it judiciously (little) nethistory.ppt

who wrote the network standards? • university researchers participated in standards work • private industry research contributed personnel • AT&T, IBM, and many others funded their employees to work on network improvements • some people did it “for free” as a sideline to their work • standards were created by “the public” and “developers everywhere” • via the RFC process (public proposals) • if many in industry and research institutions implemented the proposals, they eventually became “standard” nethistory.ppt

what is an RFC? • RFC stands for Request For Comment • RFCs are numbered standards documents • managed by the Internet Engineering Task Force (IETF) • RFC 1, Host Software was published in 1969 • thousands now exist • many are regarded as de facto standards by commercial and free software writers • many others are essentially ignored.  • RFCs remain known as RFCs even if they become standards nethistory.ppt

who writes an RFC? • not standards organizations (such as ANSI, ISO or ECMA) • published by technical experts acting on their own initiative • during a subsequent period of review, anyone on the Internet may submit comments • this process has avoided the intractible problems of many formal standards bodies • RFC 2026 is about the RFC process: The Internet Standards Process, Revision 3 • a complete RFC index is available from the IETF website • the text of a particular RFC can be found by entering its number nethistory.ppt

internet in 1977 nethistory.ppt

networking timeline - eighties • 1978 • TCP protocol (Stanford research since 1976) split into TCP and IP protocols • 1980 • ARPANET grinds to a complete halt on 27 October • because of an accidentally-propagated status-message virus • name server developed at University of Wisconsin • so users would not have to know the exact path to other systems • on January 1st, every machine connected to ARPANET had to use TCP/IP • TCP/IP became the core internet protocol, replacing NCP entirely • 1983 • first IBM personal computers sold • 1984 • Domain Name System (DNS) introduced on ARPANET • 1986 • Mail Exchanger (MX) records developed • to allow non-IP network hosts to have email domain addresses • Internet Engineering Task Force (IETF) created • to coordinate contractors for DARPA • Coordinated work on ARPANET, US Defense Data Network (DDN), and the Internet core gateway system • 1987 • email link established between Germany and China • 1989 • number of hosts breaks 100,000 nethistory.ppt

networking timeline – advent of WWW • 1990 • ARPANET ceases to exist • Tim Berners-Lee and CERN in Geneva implement HTTP for members of the international high-energy physics community • independent internet service provicers begin to spring up everywhere • 1991 • PGP (Pretty Good Privacy) released by Philip Zimmerman • 1992 • number of internet hosts breaks 1,000,000 • no web yet; email and newsnet only (mostly at command line) • world-wide web (WWW) HTTP protocol released by CERN • Tim Berners-Lee, developer nethistory.ppt

the web lumbers to its feet • 1993 • the InterNIC created by U.S. National Science Foundation (NSF) to maintain the internet: • directory and database (AT&T) • domain registration (Network Solutions Inc.) • information (General Atomics/CERFnet) • Marc Andreessen and the Univ. of Illinois develop a GUI HTTP client • Mosaic (see http://www.ibiblio.org/pioneers/andreesen.html) • first web browser; initially it was free • U.S. White House comes on-line (http://www.whitehouse.gov/): • President Bill Clinton: [email protected] • Vice-President Al Gore: [email protected] • 1996 • most internet traffic carried by independent Internet Service Providers (ISP’s) such as MCI, AT&T, Sprint, and many smaller companies • number of internet hosts exceeds 15,000,000 • planning begins for IPv6 (next generation) nethistory.ppt

IP v4 (now) vs. IP v6 (future) • the number of unassigned internet addresses is running out • a new classless scheme is gradually replacing the system based on classes A, B, and C • tied to adoption of IPv6 nethistory.ppt

the InterNIC • Internet Network Information Center • a registered service mark of the U.S. Department of Commerce and now a defunct entity • the InterNIC began as a collaboration between AT&T and Network Solutions, Inc. (NSI) supported by the National Science Foundation; it offered four services: • InterNIC Directory and Database Services -- online white pages directory and directory of publicly accessible databases • Registration Services -- domain name and IP address assignment • Support Services -- outreach, education, and information services for the Internet community • Net Scout Services -- online publications that summarize recent happenings of interest to Internet users • the InterNIC is currently an informational Web site to provide the public with information about domain name registration • ICANN (see next slide) now oversees domain name registration nethistory.ppt

ICANN • Internet Corporation for Assigned Names and Numbers • a nonprofit organization that does: • IP address space allocation • protocol parameter assignment • domain name system management • root server system management functions previously performed under U.S. Government contract • ICANN was created in the fall of 1998 in response to a policy statement issued by the US Department of Commerce. This statement called for the formation of a private sector not-for-profit Internet stakeholder to administer policy for the Internet name and address system • ICANN is responsible for managing and coordinating the DNS to ensure universal resolvability nethistory.ppt

Domain Name Service (DNS) • stands for Domain Name System (or Service) • a distributed database system • translates domain names into IP addresses, and vice versa www.example.com might translate to 198.105.232.4 • DNS is a hierarchy of databases • if one DNS server doesn't know how to translate a particular domain name, it asks another (higher-level) one, recursively until the IP address association has been returned • nslookup is the command-line network application for DNS nethistory.ppt

ICANN coordinates the root DNS servers • at the heart of the DNS are 13 special computers, called root servers • the root servers are distributed around the world • all 13 contain the same vital information • this is to spread the workload and back each other up nethistory.ppt

resiliency of the network • the network is not under centralized control • frustrating but also good • part of the collapse of USSR in the late 1980’s came from the government’s inability to suppress information from being disseminated over the world-wide computer networks • in recent years, there have been serious, coordinated cyber-attacks on the DNS root servers; as many as 11 of the 13 were once disabled… • but the internet kept working, with only some slowdown • during Katrina, the internet kept working in the stricken zones for anyone who had power and access via a phone line, cable network or satellite • in some instances, this was the only reliable source of information about what was happening in the stricken areas • a few data centers remained open, with backup power, barracading themselves inside and publishing status reports nethistory.ppt

domain names • every domain name has a suffix that indicates which top level domain it belongs to • there are only a limited number of such domains, such as: • .gov - government • .edu - education • .org – nonprofit organizations • .mil - military • .com - commercial business • .net - network service providers • .ca - Canada • .th - Thailand nethistory.ppt

DARPA spending today • in 2001 ~$500 million total ($223 to universities) • in 2005 ~$500 million total ($114 to universities) • many more grants going exclusively to defense industry • many grants won’t allow non-U.S. citizens • more grants require non-publication of results nethistory.ppt

the end of this slideset nethistory.ppt

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