History of Internet Searching

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A short history of the Internet and searching on the Internet and World Wide Web.

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History of Internet Searching

  1. 1. History of Internet Searching  Fall, 2015Fall, 2015
  2. 2. The Internet  Built in 1969.Built in 1969.  Funded by the DoD for scientific research,Funded by the DoD for scientific research, built by BBN (Bolt, Beranek & Newman)built by BBN (Bolt, Beranek & Newman) Technologies.Technologies.  Originally calledOriginally called ARPANETARPANET  AAdvanceddvanced RResearchesearch PProjectsrojects AAgencygency  First nodes (connections) were atFirst nodes (connections) were at universities (UCLA, UCSB, Stanford, Univ.universities (UCLA, UCSB, Stanford, Univ. of Utah)of Utah)  First message sent on Oct. 29, 1969 fromFirst message sent on Oct. 29, 1969 from UCLA to Stanford was “lo”UCLA to Stanford was “lo”..
  3. 3. Bolt, Beranek, and Newman (BBN)
  4. 4. Ray Tomlinson Invented Email in 1971.Invented Email in 1971. Wasn’t supposed to be working on it, he thought it would be aWasn’t supposed to be working on it, he thought it would be a “neat“neat idea”. Decided to use the @ symbol because it was not being used foridea”. Decided to use the @ symbol because it was not being used for anything else.anything else.
  5. 5. The Internet Computers that made up the ARPANET wereComputers that made up the ARPANET were calledcalled IMPIMP’s’s (Internet Message Processor)(Internet Message Processor) The ‘net is grows by about one node per month for first few years.
  6. 6. The Internet Computers that made up the ARPANET wereComputers that made up the ARPANET were calledcalled IMPIMP’s’s (Internet Message Processor)(Internet Message Processor)
  7. 7. Internet Access Speeds - Personal  An Internet Service Provider (ISP) providesAn Internet Service Provider (ISP) provides connection between user and Internet.connection between user and Internet.  DSL 1.5 MbpsDSL 1.5 Mbps  Cable 2.5 MbpsCable 2.5 Mbps  3G Cellular .5 Mbps3G Cellular .5 Mbps  4G Cellular 10 Mbps - 1 Gbps4G Cellular 10 Mbps - 1 Gbps
  8. 8. Internet Access Speeds - Professional  T-1T-1 1.544 Mbps  T-3 43.232 Mbps (28 T1's)  OC-3 155 Mbps (84 T1's)  OC-12 622 Mbps (4 OC3's)  OC-48 2.5 Gbps (4 OC12's)  OC-192 9.6 Gbps (4 OC48's)
  9. 9. Internet Access Speeds – Future  ConnectionsConnections  Lasers & Fiber OpticsLasers & Fiber Optics  BPL (Broadband Over PowerlineBPL (Broadband Over Powerline  TerabitsTerabits  Trillion Bits per SecondTrillion Bits per Second
  10. 10. Protocols  Methods of using the Internet:Methods of using the Internet:  Telnet – Access and Control ComputersTelnet – Access and Control Computers  FTP – File Transfer ProtocolFTP – File Transfer Protocol  HTTP – HyperText Transfer ProtocolHTTP – HyperText Transfer Protocol  Gopher – File Access & DownloadingGopher – File Access & Downloading  EmailEmail Uses IMAP, SMTP, or POP.Uses IMAP, SMTP, or POP.
  11. 11. History of Internet Searching  FTP – File Transfer ProtocolFTP – File Transfer Protocol  Protocol established in 1985.Protocol established in 1985.  FTP Servers provide files to FTP ClientsFTP Servers provide files to FTP Clients Problems with FTP  No organization of FTP Servers  User had to know an FTP Server existed  User had to visit FTP Server to see files
  12. 12. History of Internet Searching  ARCHIEARCHIE  1990 (No WWW)1990 (No WWW)  Alan Emtage @ McGill Univ. inAlan Emtage @ McGill Univ. in MontrealMontreal  Searchable directory of FTP filesSearchable directory of FTP files  Searched FTP Servers and indexed theirSearched FTP Servers and indexed their filesfiles  User searched the IndexUser searched the Index 
  13. 13. History of Internet Searching  GopherGopher  1991 (WWW Began)1991 (WWW Began)  Paul Lindner & Mark P. McCahill ofPaul Lindner & Mark P. McCahill of Univ. of MinnesotaUniv. of Minnesota  Named after the Univ. of Minn. MascotNamed after the Univ. of Minn. Mascot  Connected Gopher servers through theConnected Gopher servers through the Gopher hierarchy (gopherspace)Gopher hierarchy (gopherspace)
  14. 14. History of Internet Searching  WandererWanderer (Matthew Gray(Matthew Gray’s World Wide’s World Wide Web Wanderer)Web Wanderer)  First WWW EngineFirst WWW Engine  Designed to track the size of the WWWDesigned to track the size of the WWW  Captured URLCaptured URL’s and entered into’s and entered into database (Wandex)database (Wandex)  First RobotsFirst Robots “bots”“bots”
  15. 15. Search Engine Technology  Three parts to a Search EngineThree parts to a Search Engine Bots (Robots)Bots (Robots) DatabaseDatabase User InterfaceUser Interface
  16. 16. Search Engine Technology  Bots (Robots)Bots (Robots)  Also called SpidersAlso called Spiders  Computer programs sent out by QueryComputer programs sent out by Query ServersServers  Search the Internet for serversSearch the Internet for servers  Identify servers & collect informationIdentify servers & collect information  Uses links from websites to find otherUses links from websites to find other sitessites
  17. 17. Search Engine Technology  DatabaseDatabase  Collects the information from QueryCollects the information from Query Server and organizes it.Server and organizes it.
  18. 18. Search Engine Technology  User InterfaceUser Interface  Allows users to search the database andAllows users to search the database and returns the information from it.returns the information from it.
  19. 19. Search Engine Technology  Relevance RankingRelevance Ranking  Search engine measures the relevance ofSearch engine measures the relevance of the information found to your requestthe information found to your request  First search engine to use RelevanceFirst search engine to use Relevance Ranking was the Repository-BasedRanking was the Repository-Based Software Engine (RBSE) in 1993Software Engine (RBSE) in 1993
  20. 20. Search Engine Technology  Relevance Ranking (Techniques)Relevance Ranking (Techniques)  How often do the search terms appearHow often do the search terms appear  How close are the search terms to eachHow close are the search terms to each otherother  Where do the search terms appearWhere do the search terms appear  How often do the search terms appearHow often do the search terms appear compared to the length of the web pagecompared to the length of the web page

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