Transcript CH04 - TechMinded

The Internet and Web
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Please turn your
cell phone off.
Internet Technology
Internet Communications
Web technology
Web Applications
© 2004 Ken Baldauf, All rights reserved.
Internet Technology
http://www.cybergeography.org/atlas/atlas.html (topology)
© 2004 Ken Baldauf, All rights reserved.
Internet Hardware
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Internet Backbone
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The core networks that make up the Internet.
Originally one central network called ARPANET
Today made up of several
network service providers
working together.
ARPANET
© 2004 Ken Baldauf, All rights reserved.
Internet Hardware
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Network Service Providers
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Major telecom companies
that provide the Internet
backbone.
Network Service
Providers
27.9%
UUNET/WorldCom/M
CI
10.0%
AT&T
6.5%
Sprint
6.3%
Genuity (level 3)
4.1%
PSINet
3.5%
Cable & Wireless
2.8%
XO Communications
2.6%
Verio
1.5%
Qwest
© 2004 Ken Baldauf, All rights reserved.
#1 UUNet
#3 Sprint
#2 AT&T
#4 Genuity
© 2004 Ken Baldauf, All rights reserved.
Sprint Europe
AT&T Global
© 2004 Ken Baldauf, All rights reserved.
Internet Hardware
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Points of Presence (POPs)
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Facilities provided by Network Service Providers
that allow users to connect to the Internet
backbone.
Internet Service Providers
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Companies that provide users with access to the
Internet.
Top 22 ISP’s:
http://www.isp-planet.com/research/rankings/usa.html
© 2004 Ken Baldauf, All rights reserved.
Internet Hardware
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Routers: computing
devices that manage
network traffic by
evaluating data packets
and routing them to their
distination.
http://computer.howstuffworks.com/router1.htm
7’
The Cisco CRS-1 router is
controlled by a unique selfhealing and self-defending
operating system designed for
always-on operation while
scaling system capacity up to 92
Tbps. Routers such as this one
manage traffic on the Internet
Backbone.
© 2004 Ken Baldauf, All rights reserved.
Packet Switching
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Packet Switching Network
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divide all network data into small packets
for faster more efficient delivery.
An email message
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it looks like I
might graduate this semester after all! :-) My computer
teacher is really great and I guess that I learned more than
I thought in those wonderful lectures that I had previously
written you about….
© 2004 Ken Baldauf, All rights reserved.
Packet Switching
Divided into packets
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
looks like I might graduate this semester after all! :-) My
computer teacher is really great and I guess that I
learned more than I thought in those wonderful lectures
that I had previously written you about….
© 2004 Ken Baldauf, All rights reserved.
Packet Switching
Packet headers added
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
Message 3761HZA Date May 1
Packet 1 of 3
From [email protected]
To [email protected]
looks like I might graduate this semester
after all! :-) My computer teacher is really
great and I guess that I
Message 3761HZA Date May 1
Packet 2 of 3
From [email protected]
To [email protected]
learned more than I thought in those
wonderful lectures that I had previously
written you about….
Message 3761HZA Date May 1
Packet 3 of 3
From [email protected]
To [email protected]
© 2004 Ken Baldauf, All rights reserved.
Packet Switching
Each packet sent individually over the network
© 2004 Ken Baldauf, All rights reserved.
Packet Switched Network
Router
Router
Router
Router
Router
Router
Router
Router
Router
email
Router
Router
Router
Router
email
Router
Router
© 2004 Ken Baldauf, All rights reserved.
Circuit Switched Network
© 2004 Ken Baldauf, All rights reserved.
Packet Switching
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Packet switching is much more efficient
than circuit switching.
Technology: Networking/Telecoms
Wednesday 28 May 2003
Sprint moves to packet-switch network
Sprint is to change its entire circuit-switched telephone network to packet
technology in an attempt to keep up with customer demand for capacity.
Sprint's eight million lines will be moved over to the packet-based asynchronous
transfer mode (ATM) system, allowing voice, video and data to be broken down into
small digital blocks and sent, in effect, simultaneously.This allows the network to be
used more efficiently, and will also allow new multimedia services, Sprint said.
Sprint is the first major telecoms company to move all of its local, tandem and longdistance networks over to packet technology, according to Nortel
Networks spokeswoman Ann Fuller.
© 2004 Ken Baldauf, All rights reserved.
Packets Demo
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Demo
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http://acns.fsu.edu/~zeisler/usedu.html
© 2004 Ken Baldauf, All rights reserved.
Protocols
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Rules that govern how data is transmitted
and received.
Govern all Network and Internet
communications:
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The Internet
The Web
Email
Instant Messaging
Etc.
© 2004 Ken Baldauf, All rights reserved.
Internet Protocols
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TCP/IP
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Transaction Control Protocol (TCP): Divides data into
packets for tramission, and reassembles data from
packets upon delivery.
Internet Protocol (IP): Controls the delivery of packets
between IP addresses.
IP Address
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a 32-bit number that identifies each sender or receiver of
information that is sent in packets across the Internet.
10000000.11111111.10110101.00010111
128.255.181.29
www.fsu.edu
© 2004 Ken Baldauf, All rights reserved.
Network Architectures
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Client/Server
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Peer-to-Peer
Napster vs. Kazaa
© 2004 Ken Baldauf, All rights reserved.
Review: Internet Tech
© 2004 Ken Baldauf, All rights reserved.
Internet
Communications
© 2004 Ken Baldauf, All rights reserved.
Types of Communication
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Text
Voice
Video
In person
© 2004 Ken Baldauf, All rights reserved.
Types of Communication
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Synchronous Communication takes place in
real time.
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Phone conversation
Instant Messaging
Asynchronous Communication allows
participants to leave messages to be
accessed whenever.
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Voice mail
Email
SMS Texting
© 2004 Ken Baldauf, All rights reserved.
3. Phone (voice)
4. Instant messaging/Chat
5. Voice mail
6. Email
7. SMS Texting
Convenience
Asynchronous
1. Face-to-face
2. Video conferencing
Effectiveness
Synchronous
Types of Communication
© 2004 Ken Baldauf, All rights reserved.
Text Communications
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SMS Text Messaging
Predictive Text Input
1
2abc
3def
4ghi
5jkl
6mno
7pqrs
8tuv
9wxyz
0
4ghi
3def
5jkl
5jkl
6mno
Decipher this!
35 or 243 possible words
http://www.transl8it.com
© 2004 Ken Baldauf, All rights reserved.
Internet Broadcasts
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websites created to express one or more individual’s
views on a given topic (ie.
http://www.bloglines.com/topblogs)
Blog Aggregator: software that allows you to subscribe to
numerous blogs (ie. http://www.bradsoft.com/feeddemon/)
Podcast
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Syndication) A webcontent distribution
technology
Blogs (Web logs)
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RSS (Really Simple
an MP3 audio file that contains a recorded broadcast
distributed over the Internet for use on PC or Mobile media
device.
Podcast Aggregator: provides access to podcasts that
may be set to automatically download to your PC (iTunes).
Vlog (Vodcast)
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Video-based blogs (www.vlogdir.com/)
© 2004 Ken Baldauf, All rights reserved.
Consumer Generated Media
(CGM)
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The recent trend of the general public
capturing and reporting the news.
www.current.tv
© 2004 Ken Baldauf, All rights reserved.
Voice over IP (VoIP)
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Technology that
enables network
managers to route
phone calls over
the same network
they use for data.
Future of Phones: http://newsroom.cisco.com/dlls/video_audio_archive/?all
Also see Video Telephony
© 2004 Ken Baldauf, All rights reserved.
Residential VoIP
• Residential VoIP, Broadband Phone
•
Phone service over a broadband Internet
connection.
http://www.voipchoices.com/vonage.html
© 2004 Ken Baldauf, All rights reserved.
Review: Internet
Communications
© 2004 Ken Baldauf, All rights reserved.
Web Technology
© 2004 Ken Baldauf, All rights reserved.
Web Protocols & Standards
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HTTP: Hypertext Transfer Protocol defines and
controls communication between Web server and
client.
 URL: Uniform Resource Locator is the fancy name
for a Web address.
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HTML: Hypertext Markup Language is the
formatting language used to define the appearance
of Web pages.
 XML: New and popular standard for describing and
classifying data in a Web page.
© 2004 Ken Baldauf, All rights reserved.
The Internet & Web
Communications
The Web
E-commerce
Information
Distribution
The Internet
© 2004 Ken Baldauf, All rights reserved.
Browser Helpers & Plugins
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Plug-ins: Programs that work with the
browser to offer extended services –
typically the ability to view animations
or video, listen to music, or interact with
the Webpage.
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Popular plug-ins include Flash and
Quicktime.
Demos:
http://harrypotter.warnerbros.com
http://getitnow.vzwshop.com/vcast.home.do
http://www.toyota.com/vehicles/2005/prius/int360.html
© 2004 Ken Baldauf, All rights reserved.
Programming the Web
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Java, Javascript, & J2ME
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Programming languages with strong support for the
Web and mobile devices such as cell phones.
ActiveX
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Microsoft’s answer to Javascript
Downloaded/installed programs that run in
Webpages.
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Demo: http://www.nokia.com/nokia/0,6771,33213,00.html
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© 2004 Ken Baldauf, All rights reserved.
Cookies
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Data generated by a Web server, and stored
on your computer.
Used to target marketing or customize a
webpage when you next visit the server.
Demo
www.amazon.com
IE/Tools/Options/Settings/
© 2004 Ken Baldauf, All rights reserved.
Web Tools
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Search Engines: Helps us find
information on the Web through
keyword searches of databases
built by spiders or crawlers
(http://a9.com/).
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Subject Directories: A catalog
of sites collected and organized
by people.
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Portals: Web pages that serve as
entry points to the Web.
© 2004 Ken Baldauf, All rights reserved.
Web Authoring
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Web Authoring Software
Macromedia’s
Dreamweaver
software allows
you to design
Webpages and
Websites using a
WYSIWYG
interface.
© 2004 Ken Baldauf, All rights reserved.
Review: Web Tech
© 2004 Ken Baldauf, All rights reserved.
Web Applications
© 2004 Ken Baldauf, All rights reserved.
Communication and
Collaboration
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Blogs: Web logs provide a convenient means for
publishing to the Web and creating on-line public
forums.
http://www.georgewbush.com/blog/
http://blog.johnkerry.com/
© 2004 Ken Baldauf, All rights reserved.
News and Information
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On-line news services allow you to drilldown into the story to get background
information and details.
Email news demo
© 2004 Ken Baldauf, All rights reserved.
Education and Training
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Life-long learning is your future…
NETg Offers…
• 1,850 IT and
desktop e-Learning
courses
• 1,300 business and
professional
development eLearning courses
• 2,000 up to date,
searchable, IT,
Desktop and
Business Books
from Safari
• 250 instructor and
student manuals for
ILT training
© 2004 Ken Baldauf, All rights reserved.
E-commerce
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E-commerce has opened up new
opportunities in buying and selling.
© 2004 Ken Baldauf, All rights reserved.
Travel
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The Web has transformed the travel
industry.
© 2004 Ken Baldauf, All rights reserved.
Employment and Careers
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The Web assists us in researching
career possibilities:
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Selecting a career
Researching companies
Networking with colleagues
Searching want ads
Creating Resumes & Professional
Websites
© 2004 Ken Baldauf, All rights reserved.
Multimedia & Entertainment
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Music
Movies
Games
© 2004 Ken Baldauf, All rights reserved.
Questions?
Don’t forget to turn your
phone back on!!
© 2004 Ken Baldauf, All rights reserved.