Transcript Chapter 2 - La Salle University

The Internet and the World
Wide Web
Renee Roland, Dan Waters,
Amelia Wright
The Internet
Internet (aka the Net)
Usage
– More than half a billion users
Most common uses
– World Wide Web and e-mail
History
1969: ARPANET
– Linked scientists and academic researchers
1986: NSFnet connected to ARPANET
Together the two became the Internet
Until 1995
– NSFnet handled most traffic
– 1995: terminated its network and returned to a
research network
The Internet Today
Public, Cooperative, and Independent
– World Wide Web Consortium sets standards
Internet 2
– Focus is on improving current internet
– Develops and tests advanced technologies
Professionals able to communicate over long
distances
Connecting
Dial-up
– Modem and telephone line
Cable modem
– Through cable television network
DSL and ISDN
– Copper telephone lines
Accessing
Access provider
– Free or for a fee
Internet Service Provider (ISP)
– Regional or national access
Online Service Provider (OSP)
– Internet access plus member only features
Wireless Internet Service Provider (WISP)
– Wireless modems and mobile devices
IP Address
IP Address
– Unique number, identifies each connected
computer
Domain name
– Text version of IP Address
DNS server
– Translates domain name into IP address
World Wide Web Components
WWW
– Worldwide collection of electronic documents
Web page
– Each single document
Web address (URL)
– Unique address for each web page
Web Browser
Web Browser
– Allows users to access and view web pages
Web Server
– Computer that delivers web pages to your
computer
Link
– Built-in connection to related web page
Searching for Information
Search engine
– Program that finds web pages and web sites
Search text
– Typed keywords in search engine’s text box
Hits
– Web pages that contain the search text
Web Site
– Collection of related web pages and
associated items
Types of Web Sites
Portal
– Offers variety of services from one location
News
– Contains newsworthy material
Informational
– Contains factual information
Business/Marketing
– Promotes or sells products or services
Types of Web Sites Cont.
Educational
– Offers avenues for formal and informal
teaching
Entertainment
– Interactive and engaging environment
Advocacy
– Describes cause, opinion, or idea
Personal
– Maintained by private individual or family
Evaluating a Web Site
Not all information is true and accurate!
What to look for:
– Affiliation
– Audience
– Authority
– Content
– Currency
– Design
– objectivity
Web Page Multimedia
Multimedia
– Combines text with graphics, animation,
audio, video, and/or virtual reality
Graphic
– Digital representation of non-text information
– Ex: drawing, chart, photograph
Animation
– Appearance of motion
Web Page Multimedia Cont.
Audio
– Music, speech, or any sound
Video
– Full-motion images
Virtual Reality
– Use of computers to simulate real or imagined
environment
– 3D
Downloading Music
Go to a music website
– Search for, select, and pay for the music
Download the music to your hard disk
Listen to the music from your hard disk
Plug-ins
Plug-in: extends capability of a browser
Popular Plug-ins:
– Acrobat Reader
– Flash Player
– QuickTime
– RealOne Player
– Shockwave Player
– Windows Media Player
Types of E-Commerce
E-Commerce
– Business transaction over an electronic
network
Business to Consumer
– Sale of goods and services to general public
Consumer to Consumer
– One consumer sells directly to another
– Ex: E-bay
Business to Business
– Businesses exchange goods
Web Page Communication
E-mail
– transmission of messages and files via the computer
network
FTP ( File Transfer Protocol)
– An Internet standard that permits file uploading and
downloading with other computers
Newsgroup
– an online area where users have written about a
certain subject
Message Board
– a popular Web-based type of discussion group
Communication Continued
Mailing List
– a group of e-mail names and addresses given a
single name so all can receive the message
Chat Rooms
– A location on the internet server that permits users to
chat or conduct real-time typed conversations
Instant Messaging
– Real-time internet communications service that
notifies you when one or more people are online
Netiquette
Netiquette or Internet Etiquette
– a code of acceptable behaviors to be followed
on the Internet.
Rules of Netiquette
– Keep messages short
– Be polite
– Do not assume material is accurate or up to
date
– Never read someone’s private E-mail
What is Web Publishing?
Web publishing is the development and
maintenance of Web Pages.
Webmaster or Web developer maintains
a Web using software products
Five major steps to web publishing
Plan a Website
Identify the purpose
of the website
Characteristics of the
people who would
want to visit the
website
Determine ways to
differentiate your
website from others
Analyze and Design a Web Site
Determine specific way to meet the goals
identified in planning
Design layout
– Text, graphics, audio, video, and virtual reality
Obtain required hardware