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Презентация на тему Chapter 6. Telecommunications, the internet, and wireless technology

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STUDENT LEARNING OBJECTIVESEssentials of Management Information SystemsChapter 6 Telecommunications, the Internet, and Wireless TechnologyWhat are the principal components of telecommunications networks and key networking technologies?What are the main telecommunications transmission media and types of networks?How
6Chapter Telecommunications, the Internet, and Wireless TechnologyVideo Cases: Case 1 Cisco Telepresence: STUDENT LEARNING OBJECTIVESEssentials of Management Information SystemsChapter 6 Telecommunications, the Internet, and What are the principal technologies and standards for wireless networking, communication, and Hyundai Heavy Industries Creates a Wireless ShipyardProblem: Systems can’t track inventory in KT Corp builds high-speed wireless network using radio sensors, notebooks, mobiles, Web Essentials of Management Information SystemsChapter 6 Telecommunications, the Internet, and Wireless Telecommunications and Networking in Today’s Business WorldConvergence:Telephone networks and computer networks converging What Is a Computer Network?Telecommunications and Networking in Today’s Business WorldTwo or Components of a Simple Computer NetworkTelecommunications and Networking in Today’s Business WorldFigure Networks in Large CompaniesTelecommunications and Networking in Today’s Business WorldComponents can include:Hundreds Corporate Network InfrastructureTelecommunications and Networking in Today’s Business WorldFigure 6-2Today’s corporate network Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldClient/server computingDistributed computing Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldPacket switchingMethod of Packet-Switched Networks and Packet CommunicationsTelecommunications and Networking in Today’s Business WorldFigure 6-3Data Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldTCP/IP and connectivityConnectivity The Transmission Control Protocol/Internet Protocol (TCP/IP) Reference ModelTelecommunications and Networking in Today’s Types of NetworksSignals: digital versus analogModem: translates digital signals into analog formLocal-area Functions of the ModemFigure 6-5A modem is a device that translates digital Network TopologiesFigure 6-6The three basic network topologies are the bus, star, and Twisted wire (modems) Coaxial cableFiber optics and optical networksDense wavelength division multiplexing BP Amoco’s Satellite Transmission SystemFigure 6-7Communication satellites help BP Amoco transfer seismic What Is the Internet?World’s most extensive networkInternet service providers (ISPs) provide connectionsDigital Internet addressing and architectureIP addressesThe Domain Name System (DNS) converts IP addresses The Domain Name SystemFigure 6-8The Domain Name System is a hierarchical system Internet Network ArchitectureFigure 6-9The Internet backbone connects to regional networks, which in Read the Interactive Session and then discuss the following questions:What is network Internet ServicesThe Global InternetInternet servicesE-mailChatting and instant messagingNewsgroupsTelnetFile Transfer Protocol (FTP)World Wide Client/Server Computing on the InternetFigure 6-10Client computers running Web browser and other How Voice over IP WorksFigure 6-11A VoIP phone call digitizes and breaks A Virtual Private Network Using the InternetFigure 6-12This VPN is a private Read the Interactive Session and then discuss the following questions:Should managers monitor The Global InternetThe World Wide WebHTML (Hypertext Markup Language): Formats documents for The Global InternetThe World Wide WebSearch enginesStarted in early 1990s as relatively Top U.S. Web Search EnginesFigure 6-13The Global InternetEssentials of Management Information SystemsChapter How Google WorksFigure 6-14The Google search engine is continuously crawling the Web, The Global InternetThe World Wide WebWeb 2.0Second-generation services enabling people to collaborate, Web 3.0The Global Internet“Semantic Web”A collaborative effort led by W3C to add Cellular systemsCompeting standards for cellular serviceCDMA: United States onlyGSM: rest of world, Wireless computer networks and Internet accessBluetooth (802.15) Links up to 8 devices A Bluetooth Network (PAN)Figure 6-15Bluetooth enables a variety of devices, including cell An 802.11 Wireless LANFigure 6-16Mobile laptop computers equipped with wireless network interface Wireless computer networks and Internet accessWi-Fi (cont.)Hotspots: one or more access points Radio frequency identification (RFID)Use tiny tags with embedded microchips containing data about Radio frequency identification (RFID)Common uses:Automated toll-collection Tracking goods in a supply chainRequires How RFID WorksFigure 6-17RFID uses low-powered radio transmitters to read data stored Wireless sensor networks (WSNs)Networks of hundreds or thousands of interconnected wireless devices A Wireless Sensor NetworkFigure 6-18The small circles represent lower-level nodes and the
Слайды презентации

Слайд 2 STUDENT LEARNING OBJECTIVES
Essentials of Management Information Systems
Chapter 6

STUDENT LEARNING OBJECTIVESEssentials of Management Information SystemsChapter 6 Telecommunications, the Internet,

Telecommunications, the Internet, and Wireless Technology
What are the principal

components of telecommunications networks and key networking technologies?
What are the main telecommunications transmission media and types of networks?
How do the Internet and Internet technology work and how do they support communication and e-business?

Слайд 3 What are the principal technologies and standards for

What are the principal technologies and standards for wireless networking, communication,

wireless networking, communication, and Internet access?

Why are radio frequency

identification (RFID) and wireless sensor networks valuable for business?

STUDENT LEARNING OBJECTIVES

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 4 Hyundai Heavy Industries Creates a Wireless Shipyard
Problem: Systems

Hyundai Heavy Industries Creates a Wireless ShipyardProblem: Systems can’t track inventory

can’t track inventory in 4.2 sq mi shipyard in

real-time
Solution: High-speed wireless network using radio sensors web cams, and more




Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 5 KT Corp builds high-speed wireless network using radio

KT Corp builds high-speed wireless network using radio sensors, notebooks, mobiles,

sensors, notebooks, mobiles, Web cams, and connected to electric

lines in ships to overcome transmission problems cause by ship hulls
Demonstrates powerful capabilities and solutions offered by contemporary networking technology
Illustrates use of radio sensor technologies to track inventory






Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Hyundai Heavy Industries Creates a Wireless Shipyard

Слайд 6 Essentials of Management Information Systems
Chapter 6 Telecommunications, the

Essentials of Management Information SystemsChapter 6 Telecommunications, the Internet, and Wireless

Internet, and Wireless Technology
Hyundai Heavy Industries Creates a Wireless

Shipyard

Слайд 7 Telecommunications and Networking in Today’s Business World
Convergence:
Telephone networks

Telecommunications and Networking in Today’s Business WorldConvergence:Telephone networks and computer networks

and computer networks converging into single digital network using

Internet standards
Cable companies providing voice service
Broadband:
More than 68% U.S. Internet users have broadband access
Broadband wireless:
Voice and data communication as well as Internet access are increasingly taking place over broadband wireless platforms

Networking and Communication Trends

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 8 What Is a Computer Network?
Telecommunications and Networking in

What Is a Computer Network?Telecommunications and Networking in Today’s Business WorldTwo

Today’s Business World
Two or more connected computers
Major components in

simple network
Client computer
Server computer
Network interfaces (NICs)
Connection medium
Network operating system
Hub or switch
Routers
Device used to route packets of data through different networks, ensuring that data sent gets to the correct address

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 9 Components of a Simple Computer Network
Telecommunications and Networking

Components of a Simple Computer NetworkTelecommunications and Networking in Today’s Business

in Today’s Business World
Figure 6-1
Illustrated here is a very

simple computer network, consisting of computers, a network operating system residing on a dedicated server computer, cabling (wiring) connecting the devices, network interface cards (NIC), switches, and a router.

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 10 Networks in Large Companies
Telecommunications and Networking in Today’s

Networks in Large CompaniesTelecommunications and Networking in Today’s Business WorldComponents can

Business World
Components can include:
Hundreds of local area networks (LANs)

linked to firm-wide corporate network
Various powerful servers
Web site
Corporate intranet, extranet
Backend systems
Mobile wireless LANs (Wi-Fi networks)
Videoconferencing system
Telephone network
Wireless cell phones

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 11 Corporate Network Infrastructure
Telecommunications and Networking in Today’s Business

Corporate Network InfrastructureTelecommunications and Networking in Today’s Business WorldFigure 6-2Today’s corporate

World
Figure 6-2
Today’s corporate network infrastructure is a collection of

many different networks from the public switched telephone network, to the Internet, to corporate local area networks linking workgroups, departments, or office floors.

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 12 Key Digital Networking Technologies
Telecommunications and Networking in Today’s

Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldClient/server computingDistributed

Business World
Client/server computing
Distributed computing model
Clients linked through network controlled

by network server computer
Server sets rules of communication for network and provides every client with an address so others can find it on the network
Has largely replaced centralized mainframe computing
The Internet: largest implementation of client/server computing

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 13 Key Digital Networking Technologies
Telecommunications and Networking in Today’s

Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldPacket switchingMethod

Business World
Packet switching
Method of slicing digital messages into parcels

(packets), sending packets along different communication paths as they become available, and then reassembling packets at destination
Previous circuit-switched networks required assembly of complete point-to-point circuit
Packet switching more efficient use of network’s communications capacity

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 14 Packet-Switched Networks and Packet Communications
Telecommunications and Networking in

Packet-Switched Networks and Packet CommunicationsTelecommunications and Networking in Today’s Business WorldFigure

Today’s Business World
Figure 6-3
Data are grouped into small packets,

which are transmitted independently over various communications channels and reassembled at their final destination.

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 15 Key Digital Networking Technologies
Telecommunications and Networking in Today’s

Key Digital Networking TechnologiesTelecommunications and Networking in Today’s Business WorldTCP/IP and

Business World
TCP/IP and connectivity
Connectivity between computers enabled by protocols
Protocols:

rules that govern transmission of information between two points
Transmission Control Protocol/Internet Protocol (TCP/IP)
Common worldwide standard that is basis for Internet
Department of Defense reference model for TCP/IP
Four layers
Application layer
Transport layer
Internet layer
Network interface layer

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 16 The Transmission Control Protocol/Internet Protocol (TCP/IP) Reference Model
Telecommunications

The Transmission Control Protocol/Internet Protocol (TCP/IP) Reference ModelTelecommunications and Networking in

and Networking in Today’s Business World
Figure 6-4
This figure illustrates

the four layers of the TCP/IP reference model for communications.

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 17 Types of Networks

Signals: digital versus analog
Modem: translates digital

Types of NetworksSignals: digital versus analogModem: translates digital signals into analog

signals into analog form
Local-area networks (LANs)
Peer-to-peer
Client/server
Topologies: star, bus, ring
Metropolitan

and wide-area networks
Wide-area networks (WANs)
Metropolitan-area networks (MANs)

Communications Networks

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 18 Functions of the Modem
Figure 6-5
A modem is a

Functions of the ModemFigure 6-5A modem is a device that translates

device that translates digital signals into analog form (and

vice versa) so that computers can transmit data over analog networks such as telephone and cable networks.

Communications Networks

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 19 Network Topologies
Figure 6-6
The three basic network topologies are

Network TopologiesFigure 6-6The three basic network topologies are the bus, star,

the bus, star, and ring.
Communications Networks
Essentials of Management Information

Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 20 Twisted wire (modems)
Coaxial cable
Fiber optics and optical

Twisted wire (modems) Coaxial cableFiber optics and optical networksDense wavelength division

networks
Dense wavelength division multiplexing (DWDM)
Wireless transmission media and devices
Microwave
Satellites
Cellular

systems
Transmission speed (hertz, bandwidth)

Physical Transmission Media

Communications Networks

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 21 BP Amoco’s Satellite Transmission System
Figure 6-7
Communication satellites help

BP Amoco’s Satellite Transmission SystemFigure 6-7Communication satellites help BP Amoco transfer

BP Amoco transfer seismic data between oil exploration ships

and research centers in the United States.

Communications Networks

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 22

What Is the Internet?
World’s most extensive network
Internet service

What Is the Internet?World’s most extensive networkInternet service providers (ISPs) provide

providers (ISPs) provide connections
Digital subscriber line
Cable Internet connections
T1 lines
The

Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 23

Internet addressing and architecture
IP addresses
The Domain Name System

Internet addressing and architectureIP addressesThe Domain Name System (DNS) converts IP

(DNS) converts IP addresses to domain names
Hierarchical structure
Top-level domains
Internet

architecture and governance
No formal management: IAB, ICANN, W3C
The future Internet: IPv6 and Internet2

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 24 The Domain Name System
Figure 6-8
The Domain Name System

The Domain Name SystemFigure 6-8The Domain Name System is a hierarchical

is a hierarchical system with a root domain, top-level

domains, second-level domains, and host computers at the third level.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 25 Internet Network Architecture
Figure 6-9
The Internet backbone connects to

Internet Network ArchitectureFigure 6-9The Internet backbone connects to regional networks, which

regional networks, which in turn provide access to Internet

service providers, large firms, and government institutions. Network access points (NAPs) and metropolitan area exchanges (MAEs) are hubs where the backbone intersects regional and local networks and where backbone owners connect with one another.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 26 Read the Interactive Session and then discuss the

Read the Interactive Session and then discuss the following questions:What is

following questions:

What is network neutrality? Why has the Internet

operated under net neutrality up to this point in time?
Who’s in favor of network neutrality? Who’s opposed? Why?
What would be the impacts on individual users, businesses, and government if Internet providers switched to a tiered service model?
Are you in favor of legislation enforcing network neutrality? Why or why not?

Interactive Session: Organizations
The Battle Over Net Neutrality

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Global Internet

Слайд 27 Internet Services
The Global Internet
Internet services
E-mail
Chatting and instant messaging
Newsgroups
Telnet
File

Internet ServicesThe Global InternetInternet servicesE-mailChatting and instant messagingNewsgroupsTelnetFile Transfer Protocol (FTP)World

Transfer Protocol (FTP)
World Wide Web
VoIP
Unified communications
Virtual private network (VPN)
Essentials

of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 28 Client/Server Computing on the Internet
Figure 6-10
Client computers running

Client/Server Computing on the InternetFigure 6-10Client computers running Web browser and

Web browser and other software can access an array

of services on servers over the Internet. These services may all run on a single server or on multiple specialized servers.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 29 How Voice over IP Works
Figure 6-11
A VoIP phone

How Voice over IP WorksFigure 6-11A VoIP phone call digitizes and

call digitizes and breaks up a voice message into

data packets that may travel along different routes before being reassembled at the final destination. A processor nearest the call’s destination, called a gateway, arranges the packets in the proper order and directs them to the telephone number of the receiver or the IP address of the receiving computer.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 30 A Virtual Private Network Using the Internet
Figure 6-12
This

A Virtual Private Network Using the InternetFigure 6-12This VPN is a

VPN is a private network of computers linked using

a secure “tunnel” connection over the Internet. It protects data transmitted over the public Internet by encoding the data and “wrapping” them within the Internet Protocol (IP). By adding a wrapper around a network message to hide its content, organizations can create a private connection that travels through the public Internet.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 31 Read the Interactive Session and then discuss the

Read the Interactive Session and then discuss the following questions:Should managers

following questions:
Should managers monitor employee e-mail and Internet usage?

Why or why not?
Describe an effective e-mail and Web use policy for a company.
Should managers inform employees that their Web behavior is being monitored? Or should managers monitor secretly? Why or why not?

Interactive Session: People
Monitoring Employees on Networks—Unethical or Good Business?

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 32 The Global Internet
The World Wide Web
HTML (Hypertext Markup

The Global InternetThe World Wide WebHTML (Hypertext Markup Language): Formats documents

Language):
Formats documents for display on Web
Hypertext Transfer Protocol

(HTTP):
Communications standard used for transferring Web pages
Uniform resource locators (URLs):
Addresses of Web pages
E.g., http://www.megacorp.com/content/features/082602.html
Web servers
Software for locating and managing Web pages

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 33 The Global Internet
The World Wide Web
Search engines
Started in

The Global InternetThe World Wide WebSearch enginesStarted in early 1990s as

early 1990s as relatively simple software programs using keyword

indexes
Mobile search—now 15% of all searches in 2011
Search engine marketing—major source of Internet advertising revenue
SEO—process of improving rankings in search engine results
Social search—Google +1, Facebook Like
Shopping bots—Use intelligent agent software for searching Internet for shopping information

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 34 Top U.S. Web Search Engines
Figure 6-13
The Global Internet
Essentials

Top U.S. Web Search EnginesFigure 6-13The Global InternetEssentials of Management Information

of Management Information Systems
Chapter 6 Telecommunications, the Internet, and

Wireless Technology

Google is the most popular search engine on the Web, handling 84% of all Web searches.

Слайд 35 How Google Works
Figure 6-14
The Google search engine is

How Google WorksFigure 6-14The Google search engine is continuously crawling the

continuously crawling the Web, indexing the content of each

page, calculating its popularity, and storing the pages so that it can respond quickly to user requests to see a page. The entire process takes about one-half second.

The Global Internet

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 36 The Global Internet
The World Wide Web
Web 2.0
Second-generation services

The Global InternetThe World Wide WebWeb 2.0Second-generation services enabling people to

enabling people to collaborate, share information, and create new

services online
Blogs: chronological, informal Web sites created by individuals
RSS (Really Simple Syndication): syndicates Web content so aggregator software can pull content for use in another setting or viewing later
Wikis: collaborative Web sites where visitors can add, delete, or modify content on the site
Social networking sites—enable users to build communities of friends and share information

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 37 Web 3.0
The Global Internet
“Semantic Web”
A collaborative effort led

Web 3.0The Global Internet“Semantic Web”A collaborative effort led by W3C to

by W3C to add layer of meaning to the

existing Web
Goal is to reduce human effort in searching for and processing information
Ways to make Web more “intelligent” and intuitive
Increased communication and synchronization with computing devices, communities
More widespread use of cloud computing, mobile computing

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 38
Cellular systems
Competing standards for cellular service
CDMA: United States

Cellular systemsCompeting standards for cellular serviceCDMA: United States onlyGSM: rest of

only
GSM: rest of world, AT&T, T-Mobile
Third-generation (3G) networks
Higher transmission

speeds suitable for broadband Internet access
Fourth-generation (4G) networks
Entirely packet-switched
Up to 100 Mbps

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 39 Wireless computer networks and Internet access
Bluetooth (802.15)
Links

Wireless computer networks and Internet accessBluetooth (802.15) Links up to 8

up to 8 devices in 10-m area using low-power,

radio-based communication
Useful for personal networking (PANs)
Wi-Fi (802.11)
Set of standards: 802.11a, 802.11b, 802.11g, 802.11n
Used for wireless LAN and wireless Internet access
Use access points: device with radio receiver/transmitter for connecting wireless devices to a wired LAN

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 40 A Bluetooth Network (PAN)
Figure 6-15
Bluetooth enables a variety

A Bluetooth Network (PAN)Figure 6-15Bluetooth enables a variety of devices, including

of devices, including cell phones, PDAs, wireless keyboards and

mice, PCs, and printers, to interact wirelessly with each other within a small 30-foot (10-meter) area. In addition to the links shown, Bluetooth can be used to network similar devices to send data from one PC to another, for example.

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 41 An 802.11 Wireless LAN
Figure 6-16
Mobile laptop computers equipped

An 802.11 Wireless LANFigure 6-16Mobile laptop computers equipped with wireless network

with wireless network interface cards link to the wired

LAN by communicating with the access point. The access point uses radio waves to transmit network signals from the wired network to the client adapters, which convert them into data that the mobile device can understand. The client adapter then transmits the data from the mobile device back to the access point, which forward the data to the wired network.

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 42 Wireless computer networks and Internet access
Wi-Fi (cont.)
Hotspots: one

Wireless computer networks and Internet accessWi-Fi (cont.)Hotspots: one or more access

or more access points in public place to provide

maximum wireless coverage for a specific area
Weak security features
WiMax (802.16)
Wireless access range of 31 miles
Require WiMax antennas

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 43 Radio frequency identification (RFID)
Use tiny tags with embedded

Radio frequency identification (RFID)Use tiny tags with embedded microchips containing data

microchips containing data about an item and location
Tags transmit

radio signals over short distances to special RFID readers, which send data over network to computer for processing
Active RFID: tags have batteries, data can be rewritten, range is hundreds of feet, more expensive
Passive RFID: range is shorter, also smaller, less expensive, powered by radio frequency energy

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 44 Radio frequency identification (RFID)
Common uses:
Automated toll-collection
Tracking goods

Radio frequency identification (RFID)Common uses:Automated toll-collection Tracking goods in a supply

in a supply chain
Requires companies to have special hardware

and software
Reduction in cost of tags making RFID viable for many firms

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 45 How RFID Works
Figure 6-17
RFID uses low-powered radio transmitters

How RFID WorksFigure 6-17RFID uses low-powered radio transmitters to read data

to read data stored in a tag at distances

ranging from 1 inch to 100 feet. The reader captures the data from the tag and sends them over a network to a host computer for processing.

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 46 Wireless sensor networks (WSNs)
Networks of hundreds or thousands

Wireless sensor networks (WSNs)Networks of hundreds or thousands of interconnected wireless

of interconnected wireless devices embedded into physical environment to

provide measurements of many points over large spaces
Used to monitor building security, detect hazardous substances in air, monitor environmental changes, traffic, or military activity
Devices have built-in processing, storage, and radio frequency sensors and antennas
Require low-power, long-lasting batteries and ability to endure in the field without maintenance

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

Слайд 47 A Wireless Sensor Network
Figure 6-18
The small circles represent

A Wireless Sensor NetworkFigure 6-18The small circles represent lower-level nodes and

lower-level nodes and the larger circles represent high-end nodes.

Lower-level nodes forward data to each other or to higher-level nodes, which transmit data more rapidly and speed up network performance.

The Wireless Revolution

Essentials of Management Information Systems
Chapter 6 Telecommunications, the Internet, and Wireless Technology

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