e-1 management information systems for the information age copyright 2004 the mcgraw-hill companies,...

E-E-11 Management Information Systems Management Information Systems

for the Information Agefor the Information Age

Copyright 2004 Copyright 2004 The McGraw-Hill Companies, Inc. The McGraw-Hill Companies, Inc.

All rights reservedAll rights reserved

Extended Learning Module EExtended Learning Module E

Network BasicsNetwork Basics

A great module on your CD.A great module on your CD.





Presentation OverviewPresentation Overview

Peer-to-Peer Home NetworksPeer-to-Peer Home Networks Internet AccessInternet Access Business NetworksBusiness Networks LANs, MANs, WANs, and LANs, MANs, WANs, and

Communications MediaCommunications Media Communications Service ProvidersCommunications Service Providers





IntroductionIntroduction

Computer networkComputer network - - two or more two or more computers connected computers connected so that they can so that they can communicate with communicate with each other and share each other and share information, software, information, software, peripheral devices, peripheral devices, and/or processing and/or processing power. power.





IntroductionIntroductionBasic Principles of NetworksBasic Principles of Networks

1.1. Each computer must have a network Each computer must have a network card. card.

2.2. A network has at least one connecting A network has at least one connecting device.device.

3.3. There must be communications media There must be communications media connecting the network hardware connecting the network hardware devices. devices.

4.4. Each computer must have software that Each computer must have software that supports the movement of information.supports the movement of information.





Peer-to-peerPeer-to-peer network - network - a network in which a network in which a small number of computers share a small number of computers share hardware, software and/or information. hardware, software and/or information.

Peer-to-Peer Home NetworkPeer-to-Peer Home Network





Peer-to-Peer Home NetworkPeer-to-Peer Home NetworkHome Network ComponentsHome Network Components

Network interface Network interface card (NIC)card (NIC) - an - an expansion card or a expansion card or a PC Card that PC Card that connects your connects your computer to a computer to a network and provides network and provides the doorway for the doorway for information to flow in information to flow in and out.and out.






Ethernet cardEthernet card - the - the most common type of most common type of network interface network interface card. card.






Network hubNetwork hub - a device - a device that connects multiple that connects multiple computers into a network. computers into a network.

SwitchSwitch - a device that - a device that connects multiple connects multiple computers into a network computers into a network in which multiple in which multiple communications links can communications links can be in operation be in operation simultaneously. simultaneously.






RouterRouter - a device that - a device that acts as a smart hub acts as a smart hub connecting computers connecting computers into a network, and it into a network, and it also separates your also separates your network from any network from any other network it’s other network it’s connected to. connected to.






FirewallFirewall - software and/or - software and/or hardware that protects a hardware that protects a computer or network from computer or network from intruders. intruders.

Cat 5, or Category 5 Cat 5, or Category 5 cable cable - a better-constructed - a better-constructed version of the phone version of the phone twisted-pair cable. twisted-pair cable.





Peer-to-Peer Home NetworkPeer-to-Peer Home NetworkWireless Access to Your Home NetworkWireless Access to Your Home Network

Wireless network Wireless network access pointaccess point or or wireless access wireless access pointpoint - a device that - a device that allows computers to allows computers to access a wired access a wired network using radio network using radio waves. waves.





Peer-to-Peer Home NetworkPeer-to-Peer Home NetworkWireless Access to Your Home NetworkWireless Access to Your Home Network

WiFi, Wireless Fidelity, WiFi, Wireless Fidelity, or or IEEE 802.11b IEEE 802.11b - a way - a way of transmitting information of transmitting information in wave form that is in wave form that is reasonably fast and is reasonably fast and is often used for notebooks. often used for notebooks.

BluetoothBluetooth technology - technology - provides entirely wireless provides entirely wireless connections for all kinds connections for all kinds of communication of communication devices. devices.





Peer-to-Peer Home NetworkPeer-to-Peer Home NetworkHome Network with Existing Phone WiringHome Network with Existing Phone Wiring

Home PNA Home PNA (Home Phone line Networking (Home Phone line Networking Alliance) - allows you to network your Alliance) - allows you to network your home computers using telephone wiring. home computers using telephone wiring.

PNA adapter card PNA adapter card -- an expansion card an expansion card that you put into your computer to act as that you put into your computer to act as an doorway for information flowing in and an doorway for information flowing in and out. out.





Peer-to-Peer Home NetworkPeer-to-Peer Home NetworkHome Network with Existing Phone Home Network with Existing Phone

WiringWiring





Internet AccessInternet Access

Ways to Access the Internet at HomeWays to Access the Internet at Home

1.1. Telephone line and a telephone or dial-up Telephone line and a telephone or dial-up modem. modem.

2.2. Telephone line and a Digital Subscriber Line Telephone line and a Digital Subscriber Line (DSL) modem.(DSL) modem.

3.3. Cable TV line and a cable modem.Cable TV line and a cable modem.4.4. Satellite dish and a satellite modem. Satellite dish and a satellite modem. 5.5. Provider that offers wireless connection for Provider that offers wireless connection for

your notebook. your notebook.





Internet Access Internet Access

BroadbandBroadband - a high-capacity - a high-capacity telecommunications pipeline capable telecommunications pipeline capable of providing high-speed Internet of providing high-speed Internet service. service.





Internet Access Internet Access Telephone or Dial-Up ConnectionTelephone or Dial-Up Connection

Telephone modem - Telephone modem - a device that connects a device that connects your computer to your phone line so that you your computer to your phone line so that you can access another computer or network. can access another computer or network.





Internet Access Internet Access Digital Subscriber Line (DSL)Digital Subscriber Line (DSL)

Digital Subscriber Line (DSL) - Digital Subscriber Line (DSL) - a high-speed a high-speed Internet connection using phone lines, which Internet connection using phone lines, which allows you to use your phone for voice allows you to use your phone for voice communications at the same time. communications at the same time.





Internet Access Internet Access Cable ModemCable Modem

Cable modemCable modem - a - a device that uses device that uses your TV cable to your TV cable to deliver an Internet deliver an Internet connection.connection.





Internet Access Internet Access Internet over SatelliteInternet over Satellite

Satellite modemSatellite modem - - a modem that a modem that allows you to get allows you to get Internet access Internet access from a satellite from a satellite dish. dish.





Internet Access Internet Access Internet Access on Multiple ComputersInternet Access on Multiple Computers

Network address translator (NAT) – swaps Network address translator (NAT) – swaps messages between the private, internal IP messages between the private, internal IP addresses, and the public IP address, addresses, and the public IP address, when moving information between the when moving information between the Internet and network computers.Internet and network computers.





Internet Access Internet Access Wireless Internet ConnectionWireless Internet Connection

Wireless Internet service provider Wireless Internet service provider (wireless ISP)(wireless ISP) - does the same job as - does the same job as standard Internet service providers except standard Internet service providers except that you don’t need a wired connection for that you don’t need a wired connection for access. access.





Internet Access Internet Access Wireless Internet ConnectionWireless Internet Connection

Personal digital assistant (PDA)Personal digital assistant (PDA) - a - a small hand-held computer that helps you small hand-held computer that helps you surf the Web and perform simple tasks surf the Web and perform simple tasks such as note taking, calendaring, such as note taking, calendaring, appointment scheduling, and maintaining appointment scheduling, and maintaining an address book.an address book. Palms Palms and and Handspring - Handspring - run on the run on the Palm Palm

Operating SystemOperating System PocketPCPocketPCs - run on s - run on Pocket PC OSPocket PC OS





Business NetworksBusiness Networks

Client/server networkClient/server network - a network in - a network in which one or more computers are servers which one or more computers are servers and provide services to the other and provide services to the other computers which are called computers which are called clientsclients..





Business NetworksBusiness NetworksClient/Server: A Business ViewClient/Server: A Business View

Client/server networks differ according Client/server networks differ according to three factors:to three factors: Where the processing for the presentation Where the processing for the presentation

of information occurs.of information occurs. Where the processing of logic or business Where the processing of logic or business

rules occurs. rules occurs. Where the data management component Where the data management component

(DBMS) and information (database) are (DBMS) and information (database) are located. located.






Team Work

What Sort of Computer Network Does Your School Have?

(p. 12)(p. 12)






The Five Models of Client/ServerThe Five Models of Client/Server

1.1. Distributed Presentation Distributed Presentation The server handles almost all functions, including a major The server handles almost all functions, including a major

portion of the presentation. portion of the presentation.

2.2. Remote PresentationRemote Presentation The client handles all presentation functions. The client handles all presentation functions.

3.3. Distributed LogicDistributed Logic The server handles all data management and the client handles The server handles all data management and the client handles

all presentation formatting, and the logic processing is shared.all presentation formatting, and the logic processing is shared.






4.4. Remote Data ManagementRemote Data Management The server handles data management only, and the The server handles data management only, and the

client processes business rules and formats the client processes business rules and formats the presentation of results.presentation of results.

5.5. Distributed Data ManagementDistributed Data Management The client handles all presentation formatting and The client handles all presentation formatting and

business rule processing, and both the server and business rule processing, and both the server and client share data management duties.client share data management duties.






On Your Own

How Is a Server DifferentFrom a Client?

(p. 18)(p. 18)





Business NetworksBusiness NetworksClient/Server: A Physical ViewClient/Server: A Physical View

Communications Communications protocolprotocol ( (protocolprotocol) ) - a set of rules that - a set of rules that every computer every computer follows to transfer follows to transfer information. information.





LANs, MANs, WANs, and LANs, MANs, WANs, and Communications MediaCommunications Media

Classification of Networks by Classification of Networks by Geographic DistanceGeographic Distance

Local area network (LAN)Local area network (LAN) - - covers a limited geographic covers a limited geographic distance, such as an office, building, or a group of distance, such as an office, building, or a group of buildings in close proximity to each other. buildings in close proximity to each other.

Municipal area network (MAN) -Municipal area network (MAN) - covers a metropolitan covers a metropolitan area.area.

Wide area network (WAN)Wide area network (WAN) – – covers a large geographic covers a large geographic distances, such as a state, a country, or even the entire distances, such as a state, a country, or even the entire world. world.






Telecommunications Media: The Paths Telecommunications Media: The Paths That Carry InformationThat Carry Information

Communications mediaCommunications media - the paths, or physical - the paths, or physical channels, in a network over which information channels, in a network over which information travels.travels.

Wired communications mediaWired communications media - transmit - transmit information over a closed, connected path. information over a closed, connected path.

Wireless communications media -Wireless communications media - transmit transmit information through the air. information through the air.






Telecommunications Media: The Paths Telecommunications Media: The Paths That Carry InformationThat Carry Information

Wired Communications Media include:Wired Communications Media include: Twisted-pair cableTwisted-pair cable Coaxial cableCoaxial cable Optical FiberOptical Fiber

Wireless Communications Media Include:Wireless Communications Media Include: MicrowaveMicrowave SatelliteSatellite InfraredInfrared






BandwidthBandwidth

Bandwidth - Bandwidth - refers to the amount of refers to the amount of information that a communications information that a communications medium can transfer in a given amount of medium can transfer in a given amount of time. time.






Wired Communications MediaWired Communications Media The simplest type of The simplest type of

twisted-pair phone twisted-pair phone cabling (Cat 1) provides a cabling (Cat 1) provides a slow, fairly reliable path slow, fairly reliable path for information at up to 64 for information at up to 64 kilobits per second kilobits per second (Kbps).(Kbps).

A better type (Cat 3) A better type (Cat 3) provides up to 10 provides up to 10 megabits per second megabits per second (Mbps). (Mbps).






Wired Communications MediaWired Communications Media Coaxial cable (coax) - Coaxial cable (coax) -

one central wire one central wire surrounded by insulation, surrounded by insulation, a metallic shield, and a a metallic shield, and a final case of insulating final case of insulating material. material.

Coax is the kind of cable Coax is the kind of cable that delivers cable that delivers cable television transmissions television transmissions and also carries satellite and also carries satellite TV from the dish to your TV from the dish to your house.house.






Wired Communications MediaWired Communications Media

Optical fiber -Optical fiber - uses a uses a very thin glass or very thin glass or plastic fiber through plastic fiber through which pulses of light which pulses of light travel. travel.





LANs, MANs, WANs, and LANs, MANs, WANs, and Communications MediaCommunications MediaWireless Communications MediaWireless Communications Media

Wireless communications media radiate Wireless communications media radiate information into the air, either very information into the air, either very narrowly beamed or in many directions like narrowly beamed or in many directions like ripples from a pebble tossed into a pond. ripples from a pebble tossed into a pond.






Infrared and Omnidirectional Microware Infrared and Omnidirectional Microware for Short Distancesfor Short Distances

InfraredInfrared - a wireless communications medium - a wireless communications medium that uses radio waves to transmit signals or that uses radio waves to transmit signals or information.information.

Microwave Microwave transmission - a type of radio transmission - a type of radio transmission. transmission. BluetoothBluetooth WiFi WiFi






Directional Microware for Medium Directional Microware for Medium DistancesDistances

Repeater - Repeater - a device a device that receives a radio that receives a radio signal, strengthens it signal, strengthens it and sends it on. and sends it on.






Satellites for Long DistanceSatellites for Long Distance

Communications Communications satellitessatellites - - microwave repeaters microwave repeaters in space. in space.





Communications Service Communications Service ProvidersProviders

Communications service providersCommunications service providers - - third parties who furnish the conduit for third parties who furnish the conduit for information. information.

Public networkPublic network - a network on which your - a network on which your organization competes for time with organization competes for time with others.others.






Private networkPrivate network - communications media that - communications media that your organization owns or exclusively leases to your organization owns or exclusively leases to connect networks or network components. connect networks or network components.

Value-added network (VAN)Value-added network (VAN) - a semipublic - a semipublic network that provides services beyond the network that provides services beyond the movement of information from one place to movement of information from one place to another. another.






Virtual private network (VPN)Virtual private network (VPN) – – uses uses software to establish a secure channel on software to establish a secure channel on the Internet for transmitting data.the Internet for transmitting data.






Key Considerations for Communications Key Considerations for Communications MediaMedia

To determine the most To determine the most appropriate communications appropriate communications medium, you must consider:medium, you must consider: Capacity Capacity ReliabilityReliability CostCost DistanceDistance MobilityMobility

Team Work

What’s the Big Deal with Frequencies?

(p. 23)(p. 23)





Summary Summary Student Learning OutcomesStudent Learning Outcomes

1.1. Identify and describe the four basic concepts Identify and describe the four basic concepts on which networks are built.on which networks are built.

2.2. List the components you need to set up a small List the components you need to set up a small peer-to-peer network at home.peer-to-peer network at home.

3.3. Compare and contrast the various Internet Compare and contrast the various Internet connection possibilities.connection possibilities.

4.4. Describe client/server business networks from Describe client/server business networks from a business and physical point of view.a business and physical point of view.





Summary Summary Student Learning OutcomesStudent Learning Outcomes

5.5. Define local area networks (LANs), Define local area networks (LANs), municipal area networks (MANs), and municipal area networks (MANs), and wide area networks (WANs). wide area networks (WANs).

6.6. Compare and contrast the types of Compare and contrast the types of communications media.communications media.





SummarySummary Assignments & ExercisesAssignments & Exercises

1.1. Investigate cell phone technologyInvestigate cell phone technology2.2. Find out about Personal Digital Find out about Personal Digital

AssistantsAssistants3.3. What are the Internet access options in What are the Internet access options in

your area?your area?4.4. Investigate building your own home Investigate building your own home

networknetwork5.5. Investigate satellite radioInvestigate satellite radio

e-1 management information systems for the information age copyright 2004 the mcgraw-hill companies,...

Documents

peer network

network card

peer home networkpeer

wired network

home computers

network hardware devices

home networkwifi

internet access telephone