INTERNET AND     ITS APPLICATION
CONTENTS• What is Internet?• How does it work?• Internet applications in libraries- Internet as an information source– Lib...
WHAT AND HOW OF INTERNET:              A SUMMARY• Network of networks connected using a commoncommunication protocol (TCP/...
WHAT IS THE INTERNET?The Internet is a global network of computers and computer networkscommunicating     under   one   se...
HOW DOES THE INTERNET WORK?IP address• IP address is a unique address assigned to each computer connected to theInternet• ...
WHAT IS URL?UNIFORM RESOURCE LOCATOR
HOW DO YOU CONNECT TOINTERNET?• Dial-up access– PC– Modem, telephone connection– Internet account on an ISP  (VSNL, Satyam...
HOW INTERNET EVOLVED?• The Internet grew from ARPANET the first computer networkdesigned for the Advanced Research Project...
WHAT CAN YOU DO ON THEINTERNET?(Internet Services)                               TELNET• E-Mail: Messaging (SMTP)         ...
THE WORLD WIDE WEB• Invented in 1991 by Tim Berners-Lee, the web is the fastest-growingInternet service (“Killer Applicati...
WEB BROWSERS AND SERVERS1. User          sends     request2.             Browserinterprets      user’s             4. Serv...
EXAMPLES OF BROWSERS• Netscape Navigator• Microsoft Internet Explorer• Opera• Neoplanet• Mozilla• Google Chroome
WEB CONTENTText•Sound•Images•Video•Animation•Full-text•Statistical data•Abstracts/Indexes•Software•Library catalogs•News•A...
ONLINE INFORMATION RESOURCES
INTERNET APPLICATIONS • Internet supports 3 key information related activities: – Communication medium – messaging: E-Mail...
CONCLUSION• Internet - a challenge and anopportunity•With growing user familiarity withInternet, users expect compatiblese...
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  1. 1. INTERNET AND ITS APPLICATION
  2. 2. CONTENTS• What is Internet?• How does it work?• Internet applications in libraries- Internet as an information source– Library management– Library website– Digital library collections– Professional development
  3. 3. WHAT AND HOW OF INTERNET: A SUMMARY• Network of networks connected using a commoncommunication protocol (TCP/IP)– Organizational LANs, dial-up PCs connecting to ISP‟s• Computers on Internet have unique addresses –IP addresses (dynamic/ static)• Clients and Servers (hosts).– Servers host content and provide services. Clients accesscontent/services on servers• Information exchanged through „packet switching‟ (TCP/IP) – traversesthe network –origination and destination addresses - can take different „best available‟path
  4. 4. WHAT IS THE INTERNET?The Internet is a global network of computers and computer networkscommunicating under one set of guidelines, formally calledTransmission Control Protocol/Internet Protocol (TCP/IP). The Internetis not a specific place, company, or service, although places,companies and services are accessible via the Internet. Nobody ownsthe Internet. HOW DOES THE INTERNET WORK?• Protocols – standardized rules that define how computers communicateand exchange data• IP address – unique number used to identify computers on the Internet• Domain name – structured naming system to locate computers on theInternet• URL – uniform naming scheme that specifies unique addresses of Internetresources• Client and server – computing architecture used by most Internet services
  5. 5. HOW DOES THE INTERNET WORK?IP address• IP address is a unique address assigned to each computer connected to theInternet• It is used by TCP/IP to route packets of information from a sender to a locationon theInternet• IP address consist of four sets of numbers ranging from 0 to 255 Ex. 249.7.13.53IP address• 249.7.13.53• The third number set identifies the local network• The fourth number set identifies the particular machine Domain names• Domain names are the alias or English language equivalent of a computer‟s IPaddresses• Domain Name System (DNS) allows the use of easier to remember domainnames instead of IP addresses to locate computers on the Internet
  6. 6. WHAT IS URL?UNIFORM RESOURCE LOCATOR
  7. 7. HOW DO YOU CONNECT TOINTERNET?• Dial-up access– PC– Modem, telephone connection– Internet account on an ISP (VSNL, Satyam…)– Dynamic IP address• Dedicated access– Leased line– Connect to organizational intranet– PC with network card– Static IP addresses
  8. 8. HOW INTERNET EVOLVED?• The Internet grew from ARPANET the first computer networkdesigned for the Advanced Research Projects Agency (ARPA) of theU.S Department of Defense• ARPA sponsored research on interconnecting geographically remotecomputers to allow communication and sharing of data and resources• The goal was to create a communications network that could existeven if parts of it was incapacitated
  9. 9. WHAT CAN YOU DO ON THEINTERNET?(Internet Services) TELNET• E-Mail: Messaging (SMTP) • Service that allows one computer• Remote computer access (Telnet) to• File Transfer (FTP) access another computer• World Wide Web (HTTP) • Enables the user to exchange• Chat (IRC) data and• Internet telephony, mobile access, etc.ELECTRONIC MAIL (E-MAIL) issue commands on the other computer,• The most popular use of the Internet• Available for free on the Web the Telnet host– Yahoo Mail, Hotmail • Mainly used by libraries to allow• Valid e-mail address consists of a access to information stored inusername and a domain name separated their computersby the @ sign• Format: username@hostname.domainexample: me@hotmail.com
  10. 10. THE WORLD WIDE WEB• Invented in 1991 by Tim Berners-Lee, the web is the fastest-growingInternet service (“Killer Application”)• Based on HTML (Hyper Text Markup Language) allowing users toaccess data in multimedia format• Simplest unit is the Webpage, primarily a document encoded in HTMLformat that can be accessed by using a browser• HTML links contents of a Webpage to each other as well as to otherWeb pages through a hyperlink• Each page has an address, a Uniform Resource Locator (URL) THE WEB COMPONENTS• Web browsers and servers - Web browsers are application softwareused to access files or applications which are located and run by Webservers (web sites).• Web contents - files in several formats text, multimedia, video, audio,etc...that are available through the World Wide Web• HTTP and HTML - HTTP is the protocol used in World Wide Web totransfer files from one computer to another while HTML is used to formatand display Web pages
  11. 11. WEB BROWSERS AND SERVERS1. User sends request2. Browserinterprets user’s 4. Server sendsselection and makes requested files to browserrequest from to be interpreted.appropriate server. and 3. Server accepts 5. User receives fileprocesses request frombrowser.
  12. 12. EXAMPLES OF BROWSERS• Netscape Navigator• Microsoft Internet Explorer• Opera• Neoplanet• Mozilla• Google Chroome
  13. 13. WEB CONTENTText•Sound•Images•Video•Animation•Full-text•Statistical data•Abstracts/Indexes•Software•Library catalogs•News•And more
  14. 14. ONLINE INFORMATION RESOURCES
  15. 15. INTERNET APPLICATIONS • Internet supports 3 key information related activities: – Communication medium – messaging: E-Mail – Information access medium - Internet asb Information Source – Publishing, distribution and dissemination medium – information hosting and delivery INTERNET AND LIBRARIES • Provide access to online information resources • Library management • Library website: Online L&I services • Develop digital library collections • Professional self-learning ACCESS TO ONLINE INFORMATION RESOURCES• E-journals, bibliographic databases, patents, technical reports, e-books,etc.• Licensed commercial online resources– Consortia subscription (INDEST, INFONET)– Library subscription• Freely available online resources– High-quality education and research related resources are available todayfor free
  16. 16. CONCLUSION• Internet - a challenge and anopportunity•With growing user familiarity withInternet, users expect compatibleservices from Libraries•Developing necessary networkinfrastructure, competence and skillsare key requirements for success

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