Computer Concepts Computer Concepts - - Illustrated Illustrated Introductory, Seventh Edition Introductory, Seventh Edition

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Computer Concepts
Computer Concepts
-
-
Illustrated
Illustrated
Introductory, Seventh Edition
Introductory, Seventh Edition
UNIT G:
The Web and E-Commerce
Introducing Web Technology
Introducing Web Technology
Web -collection of documents called Web
pages
Accessed over Internet
Related by using links
Web site -Collection of related Web pages
accessed using browser
Web Page -HTML document containing
embedded HTML tags
Specify how document should be displayed or
contain links to other documents, graphics, or
sound or video files
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Technology
Introducing Web Technology
Computer Concepts –Illustrated Introductory, Seventh Edition
Web Page Example
Introducing Web Technology
Introducing Web Technology
Link (hyperlink, hypertext link)
Navigation tool on Web page
Click to open and view related documents
Hypertext Transfer Protocol (HTTP)
Communications protocol used to transport data over
Web
Hypertext Markup Language (HTML)
Set of specifications used to create Web pages
Uniform Resource Locator (URL)
Unique address used to identify each Web page
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Technology
Introducing Web Technology
Web server
Computer that uses special software to
transmit Web pages over Internet
Uses HTTP software
•Always running when server is on
•Ready to take requests
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Technology
Introducing Web Technology
HTTP status code
Indicates whether or not request can be fulfilled
Computer Concepts –Illustrated Introductory, Seventh Edition
Examining Types of Web Sites
Examining Types of Web Sites
Domain name
Key component of
URLs and email
addresses
Ends with extension
that indicates its
top-level domain
Computer Concepts –Illustrated Introductory, Seventh Edition
Examining Types of Web Sites
Examining Types of Web Sites
Sharing opinions and ideas on Web
Blog-Web site where people can provide
commentary or news on subject
•Some people use blogsfor personal online diaries
Wiki–Collaborative Web site accessed and
edited by anyone in world who wants to
contribute
Web 2.0 -Refers to new
and innovative ways of
using Web
•Uses same Internet
communications infrastructure
as original Web
Computer Concepts –Illustrated Introductory, Seventh Edition
Examining Types of Web Sites
Examining Types of Web Sites
Podcasts-Files distributed through
downloads or use of feed such as
RSS
Videocasts-Similar to podcasts, but
with video rather than audio files
RSS (Rich Site Summary or Really
Simple Syndication) -Format for
feeding or syndicating content from
Web sites to your computer
Computer Concepts –Illustrated Introductory, Seventh Edition
Examining Types of Web Sites
Examining Types of Web Sites
Socializing on WEB
Social networking sites
•Facebook, Classmates, MySpace, Bebo
Instant Messaging (IM)
•One-on-one real-time messaging over network
File sharing (P2P file sharing)
Exchanging files from one computer to another
directly over Internet
•Bit Torrent -file sharing protocol that distributes role
of file servers across many computers
•File sharing raises ethical issues
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Page Authoring
Introducing Web Page Authoring
HTML -markup language
HTML tags –Used by authors to mark
up documents
Specify how document should appear on
screen or printed page
HTML -several versions
HTML 4
XHTML
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Page Authoring
Introducing Web Page Authoring
Computer Concepts –Illustrated Introductory, Seventh Edition
Source HTML Document and Its
Web Page
Introducing Web Page Authoring
Introducing Web Page Authoring
Web authoring software
Provides tools specifically designed to enter and format
Web page text, graphics, and links
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Browsers
Introducing Web Browsers
All browsers share common features
and capabilities
Space for entering URLs
Back button
Forward button
Home page selection
Print command
Stop button
Find command
Bookmarks
Computer Concepts –Illustrated Introductory, Seventh Edition
Introducing Web Browsers
Introducing Web Browsers
Computer Concepts –Illustrated Introductory, Seventh Edition
Popular Browsers
Computer Concepts –Illustrated Introductory, Seventh Edition
Popular Browsers
Introducing Web Browsers
Introducing Web Browsers
MozillaFirefox
Google Chrome
Introducing Web Browsers
Introducing Web Browsers
Bookmark
History
Helper application (add-on, plug-in, player)
Web cache
Browser gets pages and graphics to form Web
page
Material is stored in temporary files called Web
cache or browser cache
Allows speedier switching back and forth
between sites
Computer Concepts –Illustrated Introductory, Seventh Edition
Exercises
Write your answers and send them to
cs180.chuan@gmail.com
Subject: exercises Concept Unit G-1
Explain the following terms:
HTML
Web cache
Hyperlink