Transcript T1-lecture-05.ppt

CSC 330 E-Commerce
Teacher
Ahmed Mumtaz Mustehsan
GM-IT CIIT Islamabad
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Virtual Campus, CIIT
COMSATS Institute of Information Technology
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T1-Lecture-5
The Internet and The Web
Chapter-2
Part-III
T1-Lecture-5
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Wi-Fi Technologies a Review (2G)
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Wi-Fi Technologies a Review (2.5 G)
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Wi-Fi Technologies a Review (4G)
4G
Long Term
Evolution LTE
Upto 100-300
Mbps
True Broadband
on Cell phone
At&T
WiMax
72 Mbps
Alternate to LTE
wide area
network
Clearwise/Sprint
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Benefits of Internet II Technologies
2. Latency solutions:
 diffserv (differentiated quality of service)
 Assigns different levels of priority to packets
depending on type of data being transmitted. e.g.
video data needs priority.
 Video on Demand (VoD) will be possible for every
client.
3. Guaranteed service levels and lower error rates
 possible to purchase the right to move data through
the network at a guaranteed speed in return for
higher fees.
 Improved capacity and packet switching will
inevitably impact quality of data transmissions,
reducing error rates and boosting customer
satisfaction.
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Benefits of Internet II Technologies
4. Declining Costs
 As the Internet pipeline is upgraded, the availability of
broadband service will expand beyond major
metropolitan areas, significantly reducing the costs of
access.
 More users means lower cost, as products and
technology catch on in the mass market.
 Both broadband and wireless service fees are
expected to decline as geographic service areas
increase, in fact due to competition for the business.
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Bandwidth Demand of various web Applications
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Development of the Web
1989–1991: Web invented
Tim Berners-Lee at CERN
HTML, HTTP, Web server, Web browser
1993: Mosaic Web browser w/GUI
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Andreessen and others at NCSA
Runs on Windows, Macintosh, or Unix
1994: Netscape Navigator,
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First commercial Web browser
Andreessen, Jim Clark
1995: Microsoft Internet Explorer
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Some initial products of the World Wide Web
Mosaic
 Web browser with a graphical user interface (GUI)
that made it possible to view documents on the Web
graphically.
Universal computing
 The sharing of files, information, graphics, sound,
video, and other objects across all computer
platforms in the world, regardless of operating
system
Netscape Navigator
 The first commercial Web browser.
Internet Explorer
 Microsoft’s Web browser
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Hypertext
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Text formatted with embedded links
◦ Links connect documents to one another, and to
other objects such as sound, video, or animation
files
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Uses Hypertext Transfer Protocol (HTTP) and URLs to
locate and transfer resources on the Web
Example URL
http://www.comsats.edu.pk/Offices/Research.aspx
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Markup Languages
Generalized Markup Language (GML)—1960s
 The concept behind document formatting was
actually first floated in 1960
Standard Generalized Markup Language (SGML) early
GML,1986
 The purpose of SGML was to help very large
organizations format and categorize large collections
of documents and run independent of any s/w
program
Hypertext Markup Language (HTML)
 one of the next generation of GMLs that is relatively
easy to use in Web page design. HTML provides
Web page designers with a fixed set of markup “tags”
that are used to format a Web page
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Markup Languages
eXtensible Markup Language (XML)
 a markup language specification developed by the
W3C (World Wide Web Consortium)
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Data and Tags designed to describe data are
provided/labled by the users.
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Web Servers and Web Clients
Web server software:
 Enables a computer to deliver Web pages to clients on networks
that request this service by sending an HTTP request examples:
Apache and Microsoft IIS. The Basic capabilities include:
 Security services:
◦ consist mainly of authentication services that verify that the
person trying to access the site is authorized to do so.
 FTP:
◦ allows users to transfer files to and from the server as per
permission granted.
 search engine
◦ enable users to search the entire Web for particular documents,
◦ enable indexing of the site’s Web pages and content, and permit
easy keyword searching of the site’s content.
 Data capture
◦ monitoring site traffic, who visited the site, how long , the date
and time of each visit, and which specific pages were accessed.
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Web Servers and Web Clients
Web server
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Can refer to Web server software or physical server
Specialized servers: database servers, ad-servers, mail server,
video server, etc.
Database server ; server designed to access specific
information with a database.
Ad server: server designed to deliver targeted banner
advertisments
Mail server: server that provides e-mail messages
Video server: server that serves video clips
Web client:
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Any computing device attached to the Internet that is capable
of making HTTP requests and displaying HTML pages. most
commonly a Windows PC or Macintosh
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Web Browsers
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Primary purpose to display Web pages
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Internet Explorer (67%) and Firefox (23%) dominate the
market
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Other browsers include:
◦ Netscape
◦ Opera
◦ Safari (for Apple)
◦ Google’s Chrome
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The Internet and Web Features that Promote
e commerce
Internet and Web features on which the foundations of ecommerce are built include:
 E-mail
 Instant messaging
 Search engines
 Intelligent agents (bots)
 Online forums and chat
 Streaming media
 Cookies
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E-mail
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Most used application of the Internet
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Uses series of protocols for transferring messages
with text and attachments (images, sound, video clips,
etc.,) from one Internet user to another
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Most of the marketing campaigns runs on e-mail so email can be an effective marketing tool.
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Attachment: a file inserted within an e-mail message
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Instant Messaging
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Displays words typed on a computer almost
instantly, and recipients can then respond
immediately in the same way
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Different proprietary systems offered by AOL, MSN,
Yahoo, and Google
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Meebo, Digsby: allow users to communicate across
platforms of messengers
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Businessmen use IM as a client support.
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Search Engines
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Identify Web pages that match queries based on
one or more techniques
◦ Keyword indexes, page ranking
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Also serve as:
◦ Shopping tools
◦ Advertising vehicles (search engine marketing)
◦ Tool within e-commerce sites
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Outside of e-mail, most commonly used Internet
activity
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How Google Works
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Top Five search Engines
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Intelligent Agents (Bots)
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Software programs that gather and/or filter
information on a specific topic and then provide a
list of results
◦ Search bot
◦ Shopping bot
◦ Web monitoring bot
◦ News bot
◦ Chatter bot
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Intelligent Agents (Bots)
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Online Forums and Chat
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Online forum:
◦ AKA message board, bulletin board, discussion
group, board, or forum
◦ Web application that enables Internet users to
communicate with each other, although not in
real time
◦ Members visit online forum to check for new
posts
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Online chat:
◦ Similar to IM, but for multiple users
◦ Typically, users log into chat room
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Streaming Media
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Enables music, video, and other large files to be sent
to users in chunks so that when received and played,
file comes through uninterrupted
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Allows users to begin playing media files before file
is fully downloaded
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Cookies
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a tool used by Web sites to store information about
a user. When a visitor enters a Web site, the site
sends a small text file (the cookie) to the user’s
computer so that information from the site can be
loaded more quickly on future visits. The cookie
can contain any information desired by the site
designers
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Can help personalize Web site experience
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Can pose privacy threat
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Web 2.0 Features and Services
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Blogs
◦ Personal Web page that typically contains a
series of chronological entries by its author, and
links to related Web pages
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Really Simple Syndication (RSS)
◦ Program that allows users to have digital content
automatically sent to their computers over the
Internet
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Web 2.0 Features and Services
Podcasting
 an audio presentation such as a radio show, audio from a
movie, or simply personal audio presentations stored as an
audio file and posted to
the Web Wikis
 Web application that allows a user to easily add and edit
content on a Web page
New music and video services
 Videocasts: social sharing of videos
 Digital video on demand
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Web 2.0 Features and Services
IP telephony
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a general term for the technologies that use VoIP and the
Internet’s packet switched network to transmit voice and other
forms of audio communication over the Internet
Voice over Internet Protocol (VoIP)
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protocol that allows for transmission of voice and other forms
of audio communication over the Internet.
Internet Television (IPTV)
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Uses high-bandwidth Internet connections to deliver television
programming to the home
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Web 2.0 Features and Services
Online software and Web services
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Many kinds of Web services available; many free, from fullfunction applications, to much smaller chunks of code called
“widgets” and “gadgets” that you can drag to your blog, or
MySpace pages or Facebook page.
Example: on Facebook, iLike signed up 1 million users in the
first six month.
Gadgets are closely related to widgets. They are small chunks
of code that usually supply a single limited function such as a
clock, calendar, or diary
M-commerce applications
◦ Beginning to take off
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Thank You
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