Succeeding with Technology Succeeding with Technology

51
ucceeding 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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Transcript of Succeeding with Technology Succeeding with Technology

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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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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 4.5 Mbps

• 802.11g 11 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.

• 4 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

11 Mbps

Bluetooth Point-to-point

Omni-direction

Through obstructions

33 ft 1 Mbps

Infrared Point-to-point

Narrow-angle

Line-of-sight 4 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

email

email

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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

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Asy

nchr

onou

sE

ffectiveness

Co

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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!!