Succeeding with Technology
Review of Basic Concepts: CH 4-5
Telecommunications The Internet The Web
Please discontinue use of cell phone and turn off ringer
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Telecommunictions & Computer Networking
Networking Hardware, Software, and Protocols
Network TypesWireless Networks
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Telecommunications – Electronic Communications
Voice and data telecommunications Analog vs. Digital
Components Hardware Software Protocols: rules of engagement
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4
Networking Media
Coaxial Cable
Fiber Optic Cable
Radio Frequency
Twisted Pair Cable
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Signal Frequency
Frequency: the speed at which a signal changes from high to low.
Bandwidth: the range of signal frequencies that can be sent over a given medium at the same time. Often expressed as bits per second Broadband: faster than 200Kbps
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Networking Devices
Modem: modulates and demodulates signals from one form to another.
Network Adapter: Expansion card, or external device installed on a computing device used to connect to a network.
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Networking Devices
Network Control Devices: Hub Switch Repeater Bridge Gateway Router Wireless Access Point Firewall
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Wireless Fidelity (Wi-Fi)
Wi-Fi: devices that communicate wirelessly using the 802.11x protocol.
AccessPoint
• 250-1,000 ft range
• 802.11b 11 Mbps
• 802.11g 54 Mbps
• www.boingo.com
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Bluetooth
Bluetooth: Wireless technology that enables a wide variety of digital devices to communicate directly.
• 33 ft range
• 1 Mbps
• www.bluetooth.com
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Infrared (IRDA)
Infrared technology utilizes infrared rays to send data over a short distance wirelessly.
• 14 ft range
• Narrow-angle cone (30o)
• Line-of-sight
• 4-16 Mbps
• www.mzoop.com
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Wireless Comparison
Wi-fi Access point centered LAN
Omni-direction
Through obstructions
250 ft range indoors
54 Mbps
Bluetooth Point-to-point
Omni-direction
Through obstructions
33 ft 1 Mbps
Infrared Point-to-point
Narrow-angle
Line-of-sight 14 ft 4 Mbps
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Network Types
Local Area Network (LAN) Connects computer systems and devices within
a common geographic area Wide Area Network (WAN)
Connects LANs between cities, cross country, and around the world using microwave and satellite transmission or telephone lines.
Global Area Network (GAN) An International network
An internet A network consisting of connected smaller
networks
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Network Types
Personal Area Network (PAN) The interconnection of personal information
technology devices within the range of an individual - typically using Bluetooth Tech.
The original PAN was designed by Thomas Zimmerman and allowed users to pass digital electronic information through touch, by transferring information from one person’s device to another’s, running a subtly current through the body.
The Body Bus?
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Installing Home Wi-fi
Requirements High-speed Internet Cable Modem or DSL
Modem (provided be ISP)
Wireless Access Point/Router
Wireless adapters for each device.
Additional Access Points as needed. Cable Modem
Wireless Access Point / Router
To Cable Co.
http://www.linksys.com/
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The Internet
The Internet The Web Applications
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Visualization of the Internet’s topology from http://www.cybergeography.org/atlas/topology.html
What is the Internet?
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The Internet
The Internet is the world’s largest public computer network, a network of networks that provides a vast array of services to individuals, businesses, and organizations around the world.
The Internet is a combination of hardware, software, and protocols.
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Internet Hardware
The Internet backbone consists of the main pathways and connections of the Internet owned primarily by telecom companies.
Verizon’s/MCI’s UUNet carries 28% of Internet traffic
http://en.wikipedia.org/wiki/Internet_backbone
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Internet Hardware
Network Service Providers Major telecom
companies that provide the Internet backbone.
Network Service Providers27.9% Verizon/MCI/UUNET
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
http://navigators.com/isp.html
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Internet Hardware
Points of Presence (POPs) Facilities provided by Network Service Providers
that allow users to connect to the Internet backbone.
Internet Service Providers Companies that provide users with access to the
Internet. Dial-up vs. DSS vs. Cell vs. DSL vs. Cable
Top 22 ISP’s: http://www.isp-planet.com/research/rankings/usa.html
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Internet Hardware
Routers: computing devices that manage network traffic by evaluating data packets and routing them to their destination. The Cisco CRS-1 router is
controlled by a unique self-healing 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.
7’
http://computer.howstuffworks.com/router1.htm
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Packet Switching
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….
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….
An email message
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Packet Switching
learned more than I thought in those wonderful lectures that I had previously written you about….
learned more than I thought in those wonderful lectures that I had previously written you about….
Broken into packets
looks like I might graduate this semester after all! :-) My computer teacher is really great and I guess that I
looks like I might graduate this semester after all! :-) My computer teacher is really great and I guess that I
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
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Packet Switching
Packet headers added
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
Dear Joan,
Hi! How’s it goin’? Just finished midterms, and it
Message 3761HZA Date May 1 Packet 1 of 3From [email protected] [email protected]
Message 3761HZA Date May 1 Packet 1 of 3From [email protected] [email protected]
learned more than I thought in those wonderful lectures that I had previously written you about….
learned more than I thought in those wonderful lectures that I had previously written you about….
Message 3761HZA Date May 1 Packet 3 of 3From [email protected] [email protected]
Message 3761HZA Date May 1 Packet 3 of 3From [email protected] [email protected]
looks like I might graduate this semester after all! :-) My computer teacher is really great and I guess that I
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 3From [email protected] [email protected]
Message 3761HZA Date May 1 Packet 2 of 3From [email protected] [email protected]
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Packet Switching
Each packet sent individually over the network
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Packet Switched Network
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Circuit Switched Network
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Packet Switching
Packet switching is much more efficient than circuit switching.
Technology: Networking/Telecoms Wednesday 28 May 2003
Sprint moves to packet-switch networkSprint 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 long-distance networks over to packet technology, according to Nortel Networks spokeswoman Ann Fuller.
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Internet Protocols
Protocols are rules that govern how data is transmitted and received.
They govern all Network and Internet communications: The Internet The Web Email Instant Messaging Etc.
Ports are numeric addresses assigned to specific network services, and used in packet headers to direct data packets to the appropriate service. See http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
Ports are numeric addresses assigned to specific network services, and used in packet headers to direct data packets to the appropriate service. See http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
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Internet Protocols TCP/IP
Transaction Control Protocol (TCP): Divides data into packets for transmission, and reassembles data from packets upon delivery.
Internet Protocol (IP): Controls the delivery of packets between IP addresses.
IP Address 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
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Network Architectures Client/Server Peer-to-Peer
Original Napster vs. Kazaa
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The Web
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The Web
The World Wide Web is an Internet-based service that provides convenient access to information through hyperlinks.
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Web Protocols & Standards
HTTP: Hypertext Transfer Protocol defines and controls communication between Web server and client (Web browser).
URL: Uniform Resource Locator is the fancy name for a Web address.
http://www.icann.org/
http://www.cs.fsu.edu/~baldauf/presentations/swt/2/index.html
Domain name
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Web Protocols & Standards
HTML: Hypertext Markup Language is the formatting language used to define the appearance of Web pages. Try View Source in IE
XML: New and popular standard for describing and classifying data in Web pages and other Web services.
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Web-Authoring Software
Web Authoring Software allows you to create HTML documents using word-processor-like software
Macromedia’s Dreamweaver software allows you to design Webpages and Websites using a WYSIWYG interface.
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Internet and Web Applications
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The Internet
The Web
Communications
E-commerce
InformationDistribution
The Internet & Web
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Communication and Collaboration
Face to Face Video + Voice Voice Only Text Only
Effectiveness
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Communication and Collaboration
Synchronous Communication takes place in real time. Phone conversation Instant Messaging
Asynchronous Communication allows participants to leave messages to be accessed whenever. Voice mail Email SMS Texting
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1. Face-to-face
2. Video conferencing
3. Phone (voice)
4. Instant messaging/Chat
5. Voice mail
6. Email
7. SMS Texting
Syn
chro
nous
Asy
nchr
onou
sE
ffectiveness
Co
nve
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Communication and Collaboration
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Voice over IP (VoIP)
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
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Residential VoIP• Residential VoIP, also called Internet
Phone, Broadband Phone• Place phone calls over your broadband
Internet connection.
http://www.vonage.com http://www.voipchoices.com/http://www.fcc.gov/voip/
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News and Information
On-line news services allow you to drill-down into the story to get background information and details.
Webcasting uses the Web to deliver news video footage.
Webcasting uses the Web to deliver news video footage.
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Education and Training
Life-long learning is your future…NETg Offers…• 1,850 IT and
desktop e-Learning courses
• 1,300 business and professional development e-Learning courses
• 2,000 up to date, searchable, IT, Desktop and Business Books from Safari
• 250 instructor and student manuals for ILT training
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E-commerce
E-commerce has opened up new opportunities in buying and selling.
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Travel
The Web has transformed the travel industry.
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Employment and Careers
The Web assists us in researching career possibilities: Selecting a career Researching companies Networking with colleagues Searching want ads Creating Resumes & Professional
Websites
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Multimedia & Entertainment
Music Movies Games
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Information
Research on the Web Subject Directories, and Search Engines Issues of reliability Library Web sites Research Databases
Consumers are increasingly reliant upon online resources to ease and inform major life events.
Consumers are increasingly reliant upon online resources to ease and inform major life events.
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Chapter 4 & 5 Questions?
Don’t forget to turn your phone on!!