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Internet. جامعة أم القرى قسم السنة التحضيريه اعداد: أعضاء هيئة التدريس. Talk Flow!. Introduction to the Internet Brief history Explaining basic protocols Naming on the net HTML Using search engines Questions. What is the Internet?. A Network of Computer Networks

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Internet

Internet

جامعة أم القرى

قسم السنة التحضيريه

اعداد: أعضاء هيئة التدريس


Talk flow

Talk Flow!

  • Introduction to the Internet

    • Brief history

    • Explaining basic protocols

    • Naming on the net

  • HTML

  • Using search engines

  • Questions


What is the internet

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.


Internet

T3

Backbone

Network

Network

T3

Backbone

Internet

T3

Backbone

Internet

Internet


World wide web

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


Who owns the internet

Who owns the Internet?

  • The Internet Corporation for Assigned Names and Numbers (ICANN) oversees registrations.

  • InterNIC—central service to reserve domain names (lots of issues arising with “cyberquatting…”

  • Whois – domain name lookup


Brief history of the internet

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


Services through the net

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


How to read an url

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


Getting a domain name

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


Identifying a pc on the internet

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


Bandwidth

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


Hypertext

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


Creating web documents

Creating Web Documents

  • Editors:

    • WYSIWYG

      • Frontpage, Dreamweaver or N-Vu

    • Text

      • Notepad

    • Word processors

      • MS - Word


Browsers and specifications

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


  • Login