2. D-1 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Extended Learning Module D Network Basics

3. D-2 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved What is a Computer Network? What is a Computer Network? What are the Benefits of Computer Networking? What are the Benefits of Computer Networking? Describe some networks Describe some networks

4. D-3 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Computer network - two or more computers connected so that they can communicate with each other and share information, software, peripheral devices, and/or processing power. Computer network - two or more computers connected so that they can communicate with each other and share information, software, peripheral devices, and/or processing power. Introduction

5. D-4 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Advantages of Networks: streamline work processes and cut costs streamline work processes and cut costs allow people within organizations to collaborate allow people within organizations to collaborate share hardware, software, and processing power share hardware, software, and processing power enable geographically distant work groups to communicate with each other enable geographically distant work groups to communicate with each other allow businesses to share information with external groups such as suppliers allow businesses to share information with external groups such as suppliers shorten business lead times and response times shorten business lead times and response times support electronic commerce support electronic commerce

6. D-5 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Introduction Basic Principles of Networks 1. Each computer must have a network card. 2. A network has at least one connecting device. 3. There must be communications media connecting the network hardware devices. 4. Each computer must have software that supports the movement of information.

7. D-6 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Networks  Peer-to-Peer Home Networks  Internet Access Internet Access Business Networks Business Networks LANs, MANs, WANs, and Communications Media LANs, MANs, WANs, and Communications Media Communications Service Providers Communications Service Providers Peer-to-Peer Home Networks

8. D-7 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-peer network - a network in which a small number of computers share hardware, software and/or information. Peer-to-peer network - a network in which a small number of computers share hardware, software and/or information. Peer-to-Peer Home Network

9. D-8 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved You can setup a small peer-to-peer network You can setup a small peer-to-peer network  With Ethernet cards (NIC) and dedicated cables  Using the existing phone wiring Peer-to-Peer Home Network

10. D-9 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Network Home Network Components Figure D.1 Hub, Switch, and Router as Roadway Intersections page 428

11. D-10 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Network Home Network Components Typical Home Network

12. D-11 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Network Wireless Access to Your Home Network Wireless network access point or wireless access point - a device that allows computers to access a wired network using radio waves. Wireless network access point or wireless access point - a device that allows computers to access a wired network using radio waves.

13. D-12 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Network Wireless Access to Your Home Network WiFi, Wireless Fidelity, or IEEE 802.11b - a way of transmitting information in wave form that is reasonably fast and is often used for notebooks. WiFi, Wireless Fidelity, or IEEE 802.11b - a way of transmitting information in wave form that is reasonably fast and is often used for notebooks. Bluetooth technology - provides entirely wireless connections for all kinds of communication devices. Bluetooth technology - provides entirely wireless connections for all kinds of communication devices.

14. D-13 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Networks Peer-to-Peer Home Networks Internet Access  Internet Access  Business Networks Business Networks LANs, MANs, WANs, and Communications Media LANs, MANs, WANs, and Communications Media Communications Service Providers Communications Service Providers Internet Access

15. D-14 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Internet Access Ways to Access the Internet at Home 1. Telephone line and a telephone or dial-up modem. 2. Telephone line and a Digital Subscriber Line (DSL) modem. 3. Cable TV line and a cable modem. 4. Satellite dish and a satellite modem. 5. Provider that offers wireless connection for your notebook.

16. D-15 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Internet Access Wireless Internet Connection Wireless Internet service provider (wireless ISP) - does the same job as standard Internet service providers except that you don’t need a wired connection for access. Wireless Internet service provider (wireless ISP) - does the same job as standard Internet service providers except that you don’t need a wired connection for access.

17. D-16 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Networks Peer-to-Peer Home Networks Internet Access Internet Access Business Networks  Business Networks  LANs, MANs, WANs, and Communications Media LANs, MANs, WANs, and Communications Media Communications Service Providers Communications Service Providers Business Networks

18. D-17 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Business Networks Client/server network - a network in which one or more computers are servers and provide services to the other computers which are called clients. Client/server network - a network in which one or more computers are servers and provide services to the other computers which are called clients.

19. D-18 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Client/Server Architecture Client Requests & Parameters Disks for Storage Server Response & Results TCP/IP HTTP URL Database Query

20. D-19 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Business Networks Client/Server: A Physical View There are many physical implementations of client/server networks There are many physical implementations of client/server networks Conceptually, large networks work on the same principles as small ones Conceptually, large networks work on the same principles as small ones

21. D-20 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Business Networks Client/Server: A Physical View You still need You still need  Network cards  Hubs  Switches  Routers  Communications media and  Network operating systems

22. D-21 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Business Networks Client/Server: A Physical View Communications protocol (protocol) - a set of rules that every computer follows to transfer information. Communications protocol (protocol) - a set of rules that every computer follows to transfer information.

23. D-22 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Networks Peer-to-Peer Home Networks Internet Access Internet Access Business Networks Business Networks LANs, MANs, WANs, and Communications Media  LANs, MANs, WANs, and Communications Media  Communications Service Providers Communications Service Providers LANs, MANs, MANs and Communications Media

24. D-23 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved LANs, MANs, WANs, and Communications Media Classification of Networks by Geographic Distance Local area network (LAN) - covers a limited geographic distance, such as an office, building, or a group of buildings in close proximity to each other. Local area network (LAN) - covers a limited geographic distance, such as an office, building, or a group of buildings in close proximity to each other. Municipal area network (MAN) - covers a metropolitan area. Municipal area network (MAN) - covers a metropolitan area. Wide area network (WAN) – covers a large geographic distances, such as a state, a country, or even the entire world. Wide area network (WAN) – covers a large geographic distances, such as a state, a country, or even the entire world.

25. D-24 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved LANs, MANs, WANs, and Communications Media Telecommunications Media: The Paths That Carry Information Communications media - the paths, or physical channels, in a network over which information travels. Communications media - the paths, or physical channels, in a network over which information travels. Wired communications media - transmit information over a closed, connected path. Wired communications media - transmit information over a closed, connected path. Wireless communications media - transmit information through the air. Wireless communications media - transmit information through the air.

26. D-25 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved LANs, MANs, WANs, and Communications Media Telecommunications Media: The Paths That Carry Information Wired Communications Media include: Wired Communications Media include:  Twisted-pair cable  Coaxial cable  Optical Fiber

27. D-26 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved LANs, MANs, WANs, and Communications Media Telecommunications Media: The Paths That Carry Information Wireless Communications Media Include: Wireless Communications Media Include:  Microwave  Satellite  Infrared

28. D-27 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved LANs, MANs, WANs, and Communications Media Infrared and Omnidirectional Microware for Short Distances Wireless communications media radiate information into the air, either very narrowly beamed or in many directions like ripples from a pebble tossed into a pond. Wireless communications media radiate information into the air, either very narrowly beamed or in many directions like ripples from a pebble tossed into a pond.  Infrared - a wireless communications medium that uses radio waves to transmit signals or information. Bluetooth Bluetooth  Microwave transmission - a type of radio transmission. WiFi WiFi

29. D-28 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Peer-to-Peer Home Networks Peer-to-Peer Home Networks Internet Access Internet Access Business Networks Business Networks LANs, MANs, WANs, and Communications Media LANs, MANs, WANs, and Communications Media Communications Service Providers  Communications Service Providers  Communications Service Providers

30. D-29 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Communications Service Providers Communications service providers - third parties who furnish the conduit for information. Communications service providers - third parties who furnish the conduit for information. Public network - a network on which your organization competes for time with others. Public network - a network on which your organization competes for time with others.

31. D-30 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Communications Service Providers Private network - communications media that your organization owns or exclusively leases to connect networks or network components. Private network - communications media that your organization owns or exclusively leases to connect networks or network components. Value-added network (VAN) - a semipublic network that provides services beyond the movement of information from one place to another. Value-added network (VAN) - a semipublic network that provides services beyond the movement of information from one place to another. Virtual private network (VPN) – uses software to establish a secure channel on the Internet for transmitting data. Virtual private network (VPN) – uses software to establish a secure channel on the Internet for transmitting data.

32. D-31 Management Information Systems for the Information Age Second Canadian Edition Copyright 2004 The McGraw-Hill Companies, Inc. All rights reserved Communications Service Providers Key Considerations for Communications Media To determine the most appropriate communications medium, you must consider: To determine the most appropriate communications medium, you must consider:  Capacity  Reliability  Cost  Distance  Mobility