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Internet Presentation

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What is the Internet for beginners!

What is the Internet for beginners!

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    • 1. Internet Gerard Sylvester Research Informatics, KMS, ICRISAT [email_address]
    • 2. Talk Flow!
      • Introduction to the Internet
        • Brief history
        • Explaining basic protocols
        • Naming on the net
      • HTML
      • Using search engines
      • Questions
    • 3. What is the Internet?
      • A Network of Computer Networks
        • Started as early as the 1960s
        • Built to work even if a large part of the network fails
      • Intranet is not the same as Internet
      • Decentralized Client – Server model
      • Supported by various gateways and high speed backbone connections.
    • 4. Internet Network Internet Internet Network T3 Backbone T3 Backbone T3 Backbone
    • 5. World Wide Web?
      • A part of the Internet
        • www1, www2 etc.,
      • Based on hypertext and hypertext transfer protocol (HTML & HTTP)
      • Supports multiple media - Multimedia
      • Interactive, dynamic HTML
    • 6. Who owns the Internet?
      • The I nternet C orporation for A ssigned N ames and N umbers ( ICANN ) oversees registrations.
      • InterNIC—central service to reserve domain names (lots of issues arising with “cyberquatting…”
      • Whois – domain name lookup
    • 7. Brief History of the Internet
      • 1960s - Department of Defense initiative ARPANET
      • 1973 - ARPA launches the Internetting Project to explore the possibilities of linking networks
      • 1980 – First Virus halts the Internet
      • 1984 – DNS Introduced (Names rather than numbers)
      • 1999 – Internet Banking
    • 8. Internet Milestones
      • 1975 - Robert Kahn & Vinton Cerf – TCP/IP
      • 1991 : Hypertext browsing software is proposed by Tim Berners-Lee, the inventor of the World Wide Web.
      • 1993 : Mosaic, the first navigation browser to make use of graphics and a point-and-click interface, is developed by Marc Andreessen.
      • 2004 - IPv6 protocol standard
    • 9. Services through the net
      • Major services:
        • Email – Electronic Mail
        • FTP – File Transfer Protocol
        • Gopher
        • Newsgroups
        • Telnet – Remote session
        • WAIS – Wide Area Information System
        • WWW – World Wide Web
    • 10. How to read an URL
      • http://www.crida.ernet.in/dcs/proposal.htm
      • http = the protocol
      • www = the host computer or server name
      • blast = third level domain
      • ncbl = second level domain
      • org = top level domain
      • sequence = directory name
      • virtual = file name
      • htm = file type / extension
    • 11. Getting a Domain Name?
      • Top Domains:
        • edu – Educational Institutions
        • com – Company / Commercial Organizations
        • org – Non-profit Organizations
        • net – Network, network of sites
        • mil – Military Installations
        • gov – Government sites
      • Sub Domains:
        • in - India
        • jp - Japan
        • uk – United Kingdom
    • 12. Identifying a PC on the Internet
      • IP Number
        • 220.226.64.35
        • 10.15.3.20 (Intranet, Local IP)
      • To find your IP number on Windows
        • Execute ipconfig on your command prompt – XP
        • winipcgf - 98
    • 13. Bandwidth
      • Speed of data transfer through the network
      • Access through:
        • 28.8 bps (bits per second) modem
        • 56.6 modem
        • ISDN
        • T1/T3 – High speed
        • Cable
        • DSL
    • 14. Hypertext
      • Hypertext, a method of preparing text that allows readers to choose their own pathways through the material, is invented by Ted Nelson.
      • The underlined word represents a hyperlink that lets the reader click and jump to a new page.
      • Provides interactive browsing
    • 15. Creating Web Documents
      • Editors:
        • WYSIWYG
          • Frontpage, Dreamweaver or N-Vu
        • Text
          • Notepad
        • Word processors
          • MS - Word
    • 16. Browsers and Specifications
      • Browser software allows us to view, hear, retrieve information created for the web
      • Internet Explorer, Netscape Navigator, Lynx
      • For design, you must check pages in both browsers, with different versions
    • 17. Bioinformatics Resources
      • Databases
        • www.ebi.ac.uk – EMBL/EBI
        • www.rcsb.org/pdb -PDB
        • www.wwpdb.org - Worldwide Protein Data Bank
      • Genome Browsers
        • www.ncbi.nlm.nih.gov/mapview - NCBI Map Viewer
        • www.bdgp.org/annot/apollo - Apollo Genome Browser
        • http://maine.ebi.ac.uk:8000/services/cogent - Genome Tracking Database
    • 18. Bioinformatics on the Internet
      • Bioinformatics Projects
        •   www.gg.caltech.edu/hbp - Human Brain Project
        • www.geneontology.org – Gene Ontology Consortium
        • http://tolweb.org/tree - Tree of Life Project
    • 19. Gerard Sylvester
      • http://germic.blogspot.com/
      • http://www.gerardsylvester.com/
      • [email_address]

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