Computer Science 604 Study Guide

Transcription

1 Computer Science 604 Study Guide Enterprise Wide Computer Networks Credits and Copyright - Introduction - Introduction to the Study Guide Unit 1 - Introduction and Review: Network Concepts and Standards Section 2 - Introduction to Computer Networking Section 1 - Introduction to the Course Section 3 - Networking Standards and Reference Models Unit 2 - Networking Fundamentals: Transmission Basics, Media, and Hardware Section 1 - Transmission Basics and Networking Media Section 2 - Networking Hardware Unit 3 - Networking Protocols, Topologies, and Access Methods Section 1 - Computer Network Protocols Section 2 - Physical and Logical Topologies, and Access Methods Unit 4 - WANs, Internet Access and Remote Connectivities Section 1 - WAN Topologies Unit 5 - Enterprise Networking with Windows 2003 Section 1 - Network Operating Systems Section 2 - Networking with Windows Server 2003 Unit 6 - Enterprise Networking with Unix-Type of Operating Systems Section 1 - Networking with Unix-type of Operating Systems Unit 7 - NetWare-based Enterprise Computer Networking Section 1 - NetWare Based Enterprise Networking Unit 8 - Internetworking with TCP/IP for Enterprise Applications Section 1 - Networking with TCP/IP: Internet, Intranet and Extranet Unit 9 - Enterprise Network implementation and Management Section 1 - Troubleshooting Network Problems Section 2 - Maintaining and Upgrading Computer Networks Unit 10 - Enterprise Network Security: Issues, Concepts, and Techniques Section 1 - Introduction to Network Security Section 2 - Ensuring Network Integrity and Availability Computer Science 604 Study Guide 1

2 Credits and Copyright: Back to top Copyright Correspondence can be directed to: Copyright Office Athabasca University 1 University Drive Athabasca AB T9S 3A3 website: mailto:copyright@athabascau.ca When linking to a specific page on this site (deep-linking), please also link to the main site at The course materials posted to this site are the exclusive property of Athabasca University. Users may load this content into their client browser programs for temporary individual viewing in the normal process of web use. Otherwise, no material contained in these files may be downloaded, copied, adapted, printed, transferred, reproduced, or distributed by any means without the written consent of the copyright holder. In providing hypertext links to students, Athabasca University has not authorized any use of these materials that, if undertaken without permission of the copyright owners or their assignees, may constitute infringement of copyright. Permission for use of materials can only be granted by copyright owners or their assignees. Students registered in Athabasca University courses are expected to use sound judgment and discretion in visiting websites for research purposes associated with their coursework. Athabasca University will not be held responsible for the continuing availability of recommended sites, the content of sites found, or the consequences of visiting those sites. Every effort has been taken to ensure that these materials comply with the requirements of copyright clearances and appropriate credits. Athabasca University will attempt to incorporate in future reproductions any corrections that are communicated to it. The inclusion of any material in this publication is strictly in accord with the consents obtained and Athabasca University does not authorize or license any further reproduction or use without the consent of the copyright holder. Course development assistance provided by the Centre for Learning Design and Development department of Athabasca University. Athabasca University All rights reserved. Copyright 2

3 Introduction: Introduction to the Study Guide Back to top COMP 604 will cover essential telecommunication and networking technologies, with a focus on practical network design, implementation and management in the real enterprise world. Students will be exposed to network media, network architectures, network protocols, network standards, as well as network components including hubs, switches, routers, NICs and cables available in the present market. Students will learn techniques to design and implement enterprise wide computer networks with Windows 2003, Unix-type operating systems and NetWare. Students will also learn about network management and network applications for enterprise. After completing this course, a student should be able to explain important terminologies and concepts of telecommunication and computer networks, design computer networks to meet the specific needs of given enterprise, support network applications, implement enterprise wide computer networks with appropriate hardware and software components, and manage enterprise wide computer networks for good performance and security. To be a successful in taking the course, you must expect to invest considerable time in performing the required tasks. Relying too much on help and advice from others with the assignments and the projects may leave you inadequately prepared for the final exam.br /> The Study Guide The Study Guide is an important part of the course. It is designed to guide you through the learning process, though you may choose to adapt the approach presented according to your own learning style. The Study Guide consists of a contents page containing links to the ten units which comprise the course. For each unit, there are statements of purpose, plus varying numbers of sections, unit summaries and terminology lists. For each section within a given unit there are learning objectives, descriptions of tasks to complete in studying that section, and questions designed to lead you through the process of reading the designated course materials. These leading questions set the goals for your reading, and should therefor be reviewed before doing the readings. You may wish to collect these into a unit notes document for later review and reference. There are also hands-on projects and case projects for each section. If you have, or are willing to purchase additional networking devices and tools, you are encouraged to apply some of the practical exercises with those resources as well. It is recommended that as many as possible of the case studies be done, either as exercises, in your assignments, or in the final exam. Review questions, when provided, are required exercises. Equipment and Tools Needed for this Course To perform the learning activities in the course, you need a PC compatible computer with a Pentium 3 CPU or above, at least 256MB RAM, at least 8GB HD with Windows XP or 2000 installed. Your must also have an appropriate Internet connection. Cable or ADSL is recommended.br /> Teaching and learning practical computer networking is better done with appropriate experiments in labs. Because you may not have access to suitable facilities for this, it is recommended that you purchase or borrow the following equipment to set up a basic lab for yourself. Introduction: Introduction to the Study Guide 3

4 A second computer, which can an older Pentium, to network to your main computer. If you have Windows installed on the additional unit, you can use it as a client, or you can make it a server by installing Linux. A simple hub. If you already have a router, it will be useful, but is not necessary. Several feet of CAT5 UTP cable. Wiring tools, especially a crimper, which is essential for making your own network cables. Wire cutters and strippers are optional, as you can also cut and strip wire with household tools such as scissors and box knives. Proceed to the studyguide. 4

5 Unit 1: Introduction and Review: Network Concepts and Standards Back to top Unit Purpose and Notes: The purpose of this unit is to introduce you to the fundamentals of computer networking. In this unit you will become familiarized with the structure of the course. You will learn how the course study guide is organised and how to set up your computer(s) for the course. This unit is based on Chapters 1 and 2 of Network + Guide to Networks, fourth edition, by Tamara Dean (thereafter referred to as 'TD textbook'). Section 1 Section 2 Section 3 Summary Unit Summary Read the chapter summary on pages 21-23, and of the TD textbook. Review Questions Review the questions on pages 27-30, and of the TD textbook. Check the course conference for sample answers posted by other students, and for tutor commentary on those answers. Terminology Review the key terms on pages 23-27, and of the TD textook. Unit 1: Introduction and Review: Network Concepts and Standards 5

6 Unit 1 - Section 2 : Introduction to Computer Networking Back to Unit 1 Section Goal: Provide an overview of computer networking basics. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe the fundamental concepts of computer networks, the advantages and uses of computer networks, and identify the basic elements of computer networks. Objective Tasks Read Chapter 1 of TD textbook. Go over the review questions. Complete the case project 1-1. Objective Leading Questions What is a computer network? What are network resources? What is sneakernet? What are local computers and remote computers? What is a peer-to-peer network? What are the advantages and disadvantages of peer-to-peer network? What is a local area network (LAN)? What are server-based networks? What are servers in a server-based computer network? What are clients in a server-based computer network? What are workstations in a server-based computer network? What is a network operating system (NOS)? What is the client-server architecture? What is a metropolitan area network (MAN)? What is a wide area network (WAN)? What is the Internet? Is the Internet a WAN? What elements are common to all server-based computer networks? What is network interface card (NIC)? What are hosts? What is a node in computer networks? What is a network topology? What are network protocols? Summary 6

7 What are data packets? What is addressing in computer networks? What is transmission media? What services do computer networks commonly provide? What is a gateway in computer networks? Objective Activities Activity Make a plan for your first assignment. Objective Leading Questions 7

8 Unit 1 - Section 1 : Introduction to the Course Back to Unit 1 Section Goal: In this section you will receive an introduction to the course, its structure, and requirements. Learning Objectives Learning Objective 1 After completing this section, students should be able to discuss the scope of the course, explain how the study guide is organized, and describe the computer system required to perform the learning tasks set out in the course. Objective Tasks If you do not already have one, establish an Internet connection for your computer. Make a note of the particulars of your connection, including any information available regarding the type, speed or other details pertaining to your connection. if applicable, include in your notes whatever details you may have available regarding the current configuration of your computer and network. As a computing professional, you may, from time to time, be seeking a position or recruiting other professionals for your organization. In this activity, check at least ten different sources of IT job advertisements, including newspapers, online job posting services and homepages of major employers. Write a brief report on your findings, listing general job categorizations, qualifications for each type of IT position described, salary ranges, and any other statistics available. The purpose of this exercise is to provide an overview of the current employment market and practices in the industry. Objective Leading Questions What are the learning objectives of this course? How many units does this course have? How is the study guide organized? How are the leading questions to be used? How are the hands-on projects and the case studies used? When should the review questions be done? What computer(s), networking devices and tools are required to complete the course? Activity 8

9 Unit 1 - Section 3 : Networking Standards and Reference Models Back to Unit 1 Section Goal: Recognize standard organization's responsibility for what network-related standards as well as what standards are for what, and understand some important networking reference models? Learning Objectives Learning Objective 1 After completing this section, students should be able to recognize standard organizations responsibility for what network-related standards are and what standards are for, and to understand important networking reference models? Objective Tasks Read Chapter 2 of the TD textbook to find answers to the leading questions. Go over the review questions. Complete hands-on project 2-1 and 2-3. Objective Leading Questions 1. What are network standards? 2. What organizations are responsible for setting standards for computer networks? 3. What are ANSI, EIA, IEEE, ISO and ITU? 4. Why do the computer network industry need computer networking standards? 5. What is the OSI reference model for computer networks? 6. ow many layers does the OSI reference model have? 7. Who can be called a network architect? 8. v What is the physical layer of the OSI reference model? What are inside the physical layer? What does it do? 9. v What is a frame? 10. What is the network layer of the OSI reference model? What are inside the network layer? What does it do? 11. What do routers do? 12. What is segmentation? 13. What is reassembly in network layer? 14. What is the transport layer of the OSI reference model? What are inside the transport layer? What does it do? 15. What is flow-control handled by protocols at transport layer? 16. What is sequencing in transport layer? 17. What is an acknowledgement sent by transport layer? 18. What is the session layer of the OSI reference model? What are inside the session layer? What does it do? Objective Leading Questions 9

10 19. What is a session in session layer? 20. What is a terminal? 21. hat is the presentation layer of the OSI reference model? What are inside the presentation layer? What does it do? 22. What is the application layer of the OSI reference model? What are inside the application layer? What does it do? 23. What does an application program interface do? 24. What is the frame check sequence (FCS), and what does it do? 25. How does a piece of information from one computer to another in a network according to the OSI reference model? 26. What components does a typical Ethernet frame include, and how are they organized? 27. What components does a typical token ring frame include, and how are they organized? 28. How are network nodes addressed at data link layer? 29. How are network nodes addressed at network layer? 30. What is MAC address? 31. What is block ID in a MAC address? 32. What is device ID in a MAC address? 33. What IEEE 802 standards are for computer networking? 34. According to IEEE standards, what sublayers does the data link layer include? Objective Activities Activity Think about part 1 of your first assignment. Do you know how to write web pages in HTML? If not, you may want to spend some extra time on HTML and other Web technologies. Objective Leading Questions 10

11 Unit 2: Networking Fundamentals: Transmission Basics, Media, and Hardware Back to top Unit Purpose and Notes: This unit examines the fundamentals of data communication, including the basics of data transmission,networking media, and networking hardware. This unit is based on Chapters 3 and 5 of the TD textbook. Section 1 Section 2 Tasks 1. Study the unit according to the guide given in each section listed above. 2. Complete and submit your first assignment by following the instructions given in the assignment manual. Activities Assignment Complete and Submit TME 1. Summary Unit Summary Read the chapter summaries for Chapters 3 and 5 of the TD textbook. Review Questions Review questions in Chpaters 3 and 5 of the TD textbook. Check the course conference for sample answers posted by other students, and for tutor commentary on those answers. Terminology Review key terms in Chapters 3 and 5 of the TD textbook. Activity 11

12 Unit 2 - Section 1 : Transmission Basics and Networking Media Back to Unit 2 Section Goal: To provide an overview of networking media, data transmition, networking media, data encoding and modes of data transmission. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe the various classes of networking media, and how data is transmitted in each; understand how data are encoded for transmission; be able to list and describe the features of networking media and modes of data transmission. Objective Tasks 1. Study Chapter 3 of the TD textbook. 2. Complete Case projects 3-1, 3-2 and Complete hands-on project Complete the review questions and check your answers with your peers. Objective Leading Questions 1. At which layer of the OSI reference model does networking media reside? 2. What does the term transmission mean in data networking? 3. What are analog signals? 4. What are digital signals? 5. What is overhead in computer networking? 6. What is modulation? 7. What is frequency modulation (FM)? 8. What is amplitude modulation (AM)? 9. What are simplex, duplex and half-duplex transmission? 10. What is a communication channel? 11. What is multiplexing? 12. What does a multiplexer (MUX) do? 13. What does a demultiplexer do? 14. How does time division multiplexing (TDM) work? 15. How does statistical multiplexing work? 16. How does wavelength division multiplexing (WDM) work? 17. What does a fiber-optic modem do? 18. What is a point-to-point transmission? Summary 12

13 19. What is broadcasting transmission? 20. What is Webcasting? 21. What is throughput? 22. What is bandwidth? 23. What is baseband? How is data represented in a baseband communication channel? 24. What is broadband? How is data represented in a broadband communication channel? 25. What is electromagnetic interference (EMI)? 26. What is radio frequency interference (RFI)? 27. What is attenuation? 28. What does a repeater do in data communication? 29. What is the most significant factor you have to consider when choosing a transmission media? 30. What cost factors do you need to consider when choosing a transmission media? 31. What is latency? 32. What are some general means to protect transmission media from noises? 33. What is the structure of coaxial cables? 34. What are some common types of coaxial cables? 35. What are the main properties of thickwire Ethernet? 36. What are transceivers, MAU, drop cable and AUI in thicknet? 37. What are the main properties of thinnet, or thin Ethernet? 38. What kinds of connectors are used in thinnet? 39. What is a twisted-pair cable? Why are the wires twisted? 40. What is crosstalk? 41. What are the differences between UTP and STU? 42. How are UTP cables categorized? 43. How are wires in a UTP cable colored? 44. How are computer networks specified in the 10BaseT Ethernet networking standard? 45. What is an enterprise-wide network? 46. How are computer networks specified in the 100BaseT Ethernet networking standard? 47. How are computer networks specified in the 100BaseTX Ethernet networking standard? 48. How are computer networks specified in the 100BaseT4 Ethernet networking standard? 49. How are computer networks specified in the 100BaseVG Ethernet networking standard? What does the VG stand for? 50. What is the general structure of a fiber-optic cable? 51. What is a single-mode fiber? 52. What is a multimode fiber? 53. What are the main features of fiber-optic cable? 54. How are computer networks specified in the 10BaseF Ethernet networking standard? 55. How are computer networks specified in the 10BaseFX Ethernet networking standard? 56. How should network cables be installed in a commercial building according to TIA/EIA structured cabling standard? 57. What are punch-down blocks, patch panels and patch cables in network cabling? 58. What wires of UTP are used for transmitting data in thinknet, and what wires are used to receive data? 59. What is a straight-through cable according to TIA/EIA? 60. What is a crossover cable? 61. What are atmospheric transmission media? 62. What is infrared transmission? 63. What is the throughput of infrared transmission, and what is the maximum distance? 64. What is RF transmission? 65. What is narrowband RF transmission? Objective Leading Questions 13

14 66. What is spread spectrum RF transmission? 67. How do you choose the right transmission media for your network? Activities Hands-On Projects Do Project 4-1. Do other projects if you have the required hardware. Activities 14

15 Unit 2 - Section 2 : Networking Hardware Back to Unit 2 Section Goal: Provide an overview of networking hardware and its various roles in the implementation of enterprise wide computer networks. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe a variety of networking hardware components their uses in implementing enterprise wide computer networks. Objective Tasks Read Chapter 5 of the the TD textbook. Complete case project 5-1. Complete hands-on project 5-4. Complete the review questions and check your answers with your peers. Objective Leading Questions 1. What network devices are commonly used on computer networks? 2. What are network adapters? Which layers of OSI reference model do NICs belong to? 3. What may a new network adapter be able to do? 4. What are some main features of network interface cards that can be used to differentiate one from another? 5. What are some main types of NICs? 6. What is an expansion board? 7. Where do you connect a NIC on a computer? 8. What are some common bus architectures you may deal with when installing and configuring computer networks? 9. What are the differences between ISA, EISA and PCI architectures? 10. In addition to PC buses, what other interfaces may network adapters be connected to, such as on a laptop computer? 11. What computer devices can a PCMCIA slot accommodate? 12. What are the advantages and disadvantages of using a USB network adapter? 13. What are the advantages and disadvantages of using wireless network adapter? 14. Which manufactures make network interface cards? 15. What are the general procedures/steps to install a modern network adapter? 16. What is firmware? 17. Why is it important to use a Phillips-head screwdriver when installing an expansion card network adapter on a computer? Hands-On Projects 15

16 18. What is a device driver? 19. How do you install and configure NIC software on your computer? 20. How are IRQ numbers assigned to different devices on PC computers by default? What IRQ numbers may not be used by a NIC? 21. What system resources you may need to set or adjust for a NIC? 22. How do you view IRQ settings on your computer? 23. How do set or change IRQ number and memory range for a NIC? 24. What does the base I/O port setting specify? 25. What are some popular memory addresses for network adapters' base I/O ports? 26. How do you change firmware setting on a NIC? 27. What is a loopback plug? When is it needed? 28. What are the main characteristics of network adapters? 29. What are the main features of repeaters? What are the limitations of repeaters? 30. In what layer of the OSI model do repeaters operate? 31. If you need to connect a computer to jack 550 metres away, how many repeaters do you need? 32. What are the differences between repeater and hub? 33. How do you use the uplink port on a hub? 34. Compared to passive hubs, what function(s) can an intelligent hub perform? 35. What are standalone hubs? 36. What are stackable hubs, modular hubs and managed hubs? 37. How do you connect a hub to a existing network or another hub? 38. How do you connect a computer to a hub? 39. How do you choose the right hub for your needs? 40. What are bridges? 41. What are the differences between bridges and repeaters? 42. At what layer of the OSI reference model do bridges operate? 43. What functions does a bridge usually perform? 44. What functions does a bridge not perform? 45. What advantages do bridges have by being protocol-ignorant? 46. What methods may a bridge use to filter or forward packets? 47. What is transparent bridging? 48. What are the details of the spanning tree algorithm used in network bridges and routers? 49. What is source-route bridging? 50. What is translational bridging? 51. What are network switches? 52. What are the differences between switches and bridges? 53. Compared to hubs, what advantages do switches have? 54. What disadvantages do switches have? 55. What are the differences between cut-through mode and store-and-forward mode of switches? 56. What are VLANS? How do you use switches to create a virtual LAN? 57. What are higher layer switches? 58. What is a router? 59. At what layer of the OSI model do routers operate? 60. What are the main features and functions of routers? 61. What protocols are not routable? What does the term routable mean in the context of protocols? 62. What is a modular router? 63. What are the differences between static routing and dynamic routing? 64. What routing protocols may a router use? 65. What are the details of the RIP, OSPF, EIGRP, and BGP protocols? 66. What are the differences between brouters and routing switches? Objective Leading Questions 16

17 67. What are gateways? 68. Where may a gateway reside? 69. What are some popular types of gateways? Objective Leading Questions 17

18 Unit 3: Networking Protocols, Topologies, and Access Methods Back to top Unit Purpose and Notes: This unit examines the network protocols and popular topologies you need to know and use in implementing enterprise networks. This unit is based on Chapters 4 and 6 of the TD textbook. Section 1 Section 2 Summary Unit Summary Read the chapter summaries on pages , and of the TD textbook. Review Questions Review questions on pages , and of the TD textbook. Terminology Review the key terms on pages , and of the TD textbook. Unit 3: Networking Protocols, Topologies, and Access Methods 18

19 Unit 3 - Section 1 : Computer Network Protocols Back to Unit 3 Section Goal: Provide an overview of network protocols and their various roles. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe some widely-used network protocols and how they work, and identify the network layer used in each. Objective Tasks Read Chapter 4 of the TD textbook. Complete case project 4-1. Complete hands-on projects 4-1 and 4-3. Complete the review questions and check your answers with your peers. Objective Leading Questions 1. What is a protocol? 2. What are some commonly used protocols? 3. What are routable protocols? 4. What is a multiprotocol network? 5. What is TCP/IP? Is it a single protocol? 6. What are subprotocols? 7. What layers are in the TCP/IP reference model? What does each layer do? 8. What subprotocols of the TCP/IP suites are TCP/IP core protocols? 9. What is the Internet Protocol (IP)? What layer does it belong to? 10. What is a data frame? What is an IP datagram? What is a TCP segment? What are the relationships between them? 11. What is the structure of an IP datagram? What is each of the components used for? 12. Why is IP an unreliable, connectionless protocol? 13. What layer does the Transmission Control Protocol (TCP) belong to? What is TCP responsible for? 14. What is the structure of a TCP segment? What is each of the components for? 15. Why is TCP called a connection-oriented protocol? 16. What are the differences between the OSI reference model and the TCP/IP network reference model? 17. What protocols are in the core of the TCP/IP protocol suite? 18. What does the Transmission Control Protocol (TCP) do at transport layer? 19. What is a port? Summary 19

20 20. What are the differences between TCP and UDP protocols? Why is TCP said to be a connection-oriented protocol, whereas UDP is described as a connectionless protocol? 21. What does the Internet Control Message Protocol (ICMP) do? 22. What does the Address Resolution Protocol do? 23. What are some commonly used application protocols in the TCP/IP protocol suite? 24. How are network nodes addressed in TCP/IP? 25. What is TCP/IP class A address? How many network nodes can be addressed in TCP class A? 26. What are TCP/IP class B addresses? How many network nodes can be addressed in TCP class B? 27. What are TCP/IP class C addresses? How many network nodes can be addressed in TCP class C? 28. What is a loopback address? 29. If one needs a class of IP addresses, where should the request be sent? 30. What is a firewall? How can it be used allow computers within a private computer network to access the Internet? 31. What is a static/dynamic IP address? 32. What is DHCP? 33. What is the IPX/SPX protocol? 34. What are the relationships between the OSI reference model and IPX/SPX? 35. What does the IPX protocol do, and at which layer? 36. What does SPX protocol do, and at which layer? 37. What is the structure of an IPX datagram? 38. What is the structure an SPX packet? 39. What is the SAP protocol? What does it do? 40. What is the NCP protocol? What does it do? 41. How are network nodes addressed in IPX/SPX? 42. What is NetBIOS? What does it do and at which layer? 43. What is NetBEUI? What does it do and at which layer? 44. Why is NetBIOS non-routable? 45. How are network nodes addressed in NetBIOS? 46. What is the AppleTalk protocol suite? 47. What protocols are in the AppleTalk protocol suite? 48. What are the relationships between AppleTalk and the OSI reference model? 49. What are AppleTalk zones? 50. How are network nodes addressed in the AppleTalk? 51. What is binding in computer networks? 52. How do you install network protocols on a Windows machine? 53. What protocols do you need to install in order to access to the Internet? Objective Leading Questions 20

21 Unit 3 - Section 2 : Physical and Logical Topologies, and Access Methods Back to Unit 3 Section Goal: Provide an overview of LAN topologies and the methods used to access a computer network. Learning Objectives Learning Objective 1 After completing this section, students should be able: to describe various LAN topologies and their uses, and the advantages and disadvantages of each; to define switching, describe circuit switching, message switching and packet switching work, and examine their differences; and to understand how various access methods work. Objective Tasks Read Chapter 6 of the TD textbook. Complete case projects 6-1 and 6-2. Complete hands-on project 6-2. Complete the review questions and check your answers with your peers. Objective Leading Questions 1. What is the physical topology of a computer network? 2. What physical topologies are commonly used? 3. What are the main features of a bus topology? 4. What are the main components of a bus topology? 5. What are the main features of a ring topology? 6. What are the main components of a ring topology? 7. What are the main features of a star topology? 8. What are the main components of a star topology? 9. What is a hybrid physical topology? 10. What is a star-wired ring topology? What main features does it have? 11. What is a star-wired bus topology? What main features does it have? 12. What are daisy chain and daisy chained topology? Why is a daisy chain needed? 13. What are the main features of a daisy-chained topology? 14. What is a hierarchical topology? What are its' main features? 15. What does an enterprise-wide computer network topology require? 16. What are backbone networks? 17. What is a serial backbone? What are its main features? Unit 3 - Section 2 : Physical and Logical Topologies, and Access Methods 21

22 18. What is a distributed backbone? What are its main features? 19. What is a collapsed backbone? What are its main features? 20. What are the differences between a distributed backbone and a collapsed backbone? 21. What is a parallel backbone? What are its main features? 22. What is a mesh network? What are the main features of a mesh network? 23. What is a logical topology? 24. On what layers of OSI network reference model would the logical topology's elements be found? 25. What are the most popular traditional network transport systems? 26. What is switching in the context of computer networking? 27. What is circuit switching? 28. # How does circuit switching work? 29. What are the advantages and disadvantages of circuit switching? 30. What is message switching? 31. How does message switching work? 32. What are the advantages and disadvantages of message switching? 33. What is packet switching? 34. How does packet switching work? 35. What are the advantages and disadvantages of packet switching? 36. What are packets? 37. What is Ethernet's access method? 38. How does CSMA/CD work? 39. What does CSMA/CD stand for? 40. What is a collision in data transmission on Ethernet? How does it happen? How is it resolved? 41. What is a jamming in data transmission on Ethernet? How does it happen? How is it resolved? 42. What is a collision domain on an Ethernet network? 43. What is data propagation delay? How long does it take for data travel across a 900M cable at 1.8*10^8 M per second? 44. Why is an appropriate propagation delay important for Ethernet? 45. Why do different Ethernet network standards support different lengths of network segments? 46. What is the demand priority access method used by 100BaseVG? 47. What network topology does a demand priority network run on? 48. Why do data collisions not happen on demand priority network? 49. What is an intelligent hub? Where is it needed? 50. What is a shared Ethernet? 51. What are the differences between shared and switched Ethernet networks in terms of both advantages and disadvantages? 52. How does switched Ethernet increase the effective bandwidth of a network segment? 53. What are the main features of 1 Gigabit and 10 Gigabit Ethernet? 54. What are some commonly used Ethernet data frames? 55. What are the differences between different Ethernet data frames? 56. How can you specify the type of frame used on a given Ethernet network? 57. On which layer of OSI reference model does data framing occur? 58. Why may a single data frame carry any one of many higher-layer protocols? 59. What data are common among all types of Ethernet frames? 60. What is padding in data framing? What is padding necessary? 61. What are minimum and maximum Ethernet frame size respectively? 62. Why does each Ethernet frame contain a 7-byte preamble? 63. What data is behind a 7-byte preamble in an Ethernet frame? 64. Which IEEE committee is in charge of all Ethernet network standards? Objective Leading Questions 22

23 65. What is the default frame type for version 4.x or higher of the Novell NetWare network operating systems? 66. Why is IEEE frame also called LLC frame? How is it called in the Novell lexicon? 67. What is the structure of an IEEE frame? 68. What information is contained in the LLC field of an IEEE frame? 69. What is a service access point? 70. What does the frame check sequence (FCS) do? 71. What mathematical algorithm is used to generate an FCS? 72. What is the difference between IEEE frame and the Novell proprietary fame? 73. What are the differences between Ethernet II frame and IEEE frame? 74. How does an Ethernet II frame identify the upper layer protocol contained in the frame? 75. Where did IEEE SNAP frame come from? 76. Why is a good knowledge of frame types important in learning about computer networking? 77. How can multiple frame types be used on a network? 78. What are the main design considerations for Ethernet networks? 79. Which company designed LocalTalk? 80. What are the main features of LocalTalk? 81. What transmission method does LocalTalk use? 82. How do you connect a Macintosh device to a LocalTalk network? 83. What higher-level protocols does LocalTalk support? 84. How does LocalTalk support TCP/IP? 85. Which company developed Token Ring technology? 86. What are the main features of Token Ring networks? 87. What are the main features of High Speed Token Ring? 88. How do Token Ring networks work? 89. What does the active monitor in a Token Ring network do? 90. What is a token? How is a token passed around a Token Ring network? 91. Which IEEE standard describes the specification of Token Ring? 92. How many addressable stations can be connected to a Token Ring network? 93. How is an addressable station connected to a Token Ring network? 94. What is a MAU? What does it do? 95. What is a CAU? What does it do? 96. What is a LAM? What does it do? 97. What cables and connectors are used for Token Ring networks? 98. What is a media filter? What is its job? 99. How can a Token Ring network benefit from network switching? 100. What is the format of an IBM Token Ring frame? 101. What are the main considerations for Token Ring networks? 102. What is FDDI? What are the advantages and disadvantages of FDDI technology? 103. What are the main features of FDDI? 104. What is ATM (Asynchronous Transfer Mode)? 105. What does ATM specify? What makes ATM different from Ethernet and Token Ring? 106. How does ATM benefit from its fixed packet size? 107. How does a small packet size in ATM affect the potential throughput of ATM? 108. What are virtual circuits? 109. How does ATM benefit from using virtual circuits? 110. How can ATM logical topology be integrated with Ethernet or Token Ring networks? Objective Leading Questions 23

24 Unit 4: WANs, Internet Access and Remote Connectivities Back to top Unit Purpose and Notes: This unit discusses networking technologies used in the implementation of wide area networks for enterprise applications, and technologies for establishing Internet access and remote connectivity. This unit is based on Chapter 7 of the TD textbook. Section 1 Activities Assignment Complete and Sumbit TME 2. Summary Unit Summary Read the chapter summary on pages of the TD textbook. Review Questions Review the questions on pages of the TD textbook. Terminology Review the key terms on pages of the TD textbook. Unit 4: WANs, Internet Access and Remote Connectivities 24

25 Unit 4 - Section 1 : WAN Topologies Back to Unit 4 Section Goal: Provide an overview of WAN topologies. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe a variety of enterprise-wide and WAN physical topologies, their uses, advantages, and disadvantages. Objective Tasks Read the WAN Topologies section in Chapter 7 of the TD textbook to find answers to the leading questions. Complete hands-on project 7-3. Complete case project 7-1. Objective Leading Questions 1. What is a wide area network? 2. How do WAN topologies differ from LAN topologies? 3. What network devices are critical in building WANs? 4. What kind of network traffic cannot be carried by a WAN link? 5. What is a peer-to-peer WAN topology? 6. Where is the peer-to-peer WAN topology often used? 7. What are the advantages and disadvantages of dedicated circuits for WANs? 8. What is a ring WAN topology? 9. What are the advantages and disadvantages of a ring WAN compared with a peer-to-peer WAN? 10. What is a star WAN topology? 11. What are the advantages and disadvantages of a star WAN compared to other WAN topologies? 12. What is a mesh WAN topology? 13. What are the advantages and disadvantages of a mesh WAN compared to other WAN topologies? 14. What is a tiered WAN topology? 15. What are the advantages and disadvantages of a tiered WAN compared to other WAN topologies? 16. What is a WAN link? 17. What are the differences and similarities between WANs and LANs? 18. When might an organization need a WAN? 19. What is PSTN? 20. How do you access a remote server via PSTN network? 21. What are the advantages and disadvantages of PSTN? 22. Why is the throughput of a PSTN connection limited? 23. What was the X.25 technology originally designed for? Summary 25

26 24. What is the maximum throughput of X.25? 25. How does an X.25 connection work? 26. What is the relationship between X.25 and Frame Relay technology? 27. What is maximum throughput of frame relay technology? 28. How does a frame relay connection work? 29. What are switched virtual circuits and permanent switched circuits? 30. What is the committed information rate (CIR)? 31. What are the advantages and disadvantages of using frame relay? 32. What services was integrated service digital network (ISDN) designed to provide? 33. What are the differences between ISDN and PSTN? 34. What channels are all ISDN connections based on? 35. What are the bandwidth of B-channels and D-channels? 36. What kinds of ISDN connections are commonly found in North America? 37. What channels does the BRI ISDN connection have? 38. What channels does a PRI ISDN connection have? 39. What are the main features of B-ISDN? 40. How does an ISDN line connect to an analogue device? 41. How do ISDN lines usually terminate at customers' sites? 42. What are the advantages and disadvantages of using ISDN connections? 43. What are T-carriers? 44. What multiplexing technology does T-carrier transmission use? 45. What are the main features of a T1 circuit? 46. What networking devices are needed to set up a T1 WAN connection? How? 47. What is DSL? What are the main features of ADSL, HDSL and VDSL? 48. What network devices are needed for setting up an ADSL connection? 49. What does a DSLAM do? 50. How are coaxial cables used for data network? What devices are needed? How does it work? 51. Why do traditional cable TV companies have to upgrade their cables in order to provide Internet services through their cable? 52. What is HFC? 53. What are cable-drop and head-end? 54. What disadvantages may a cable-based Internet connection have compared to ADSL? 55. What was SONET technology originally developed for? 56. What makes SONET different from T-carriers? 57. How does SONET work? 58. What major factors do you need to consider when choosing a WAN? 59. What WAN technologies are available? 60. What are the major features of each WAN technology? 61. Which WAN technology offers the highest transmission speed? 62. Which is the least expensive WAN technology? 63. Which is the most reliable WAN technology? 64. What WAN technology is most popular in the market? 65. Which WAN technology would you choose for individual or unimportant transmissions? 66. Which WAN technology would you choose for mission-critical applications? 67. How do you secure your WAN? 68. What are the major security threats to WANs? How do you deal with these threats? 69. What are VPNs? 70. What are the advantages of using VPN to implement a WAN? 71. How security and privacy issues are addressed in VPN? 72. What does remote connectivity mean? How is it different from WAN? Objective Leading Questions 26

27 73. In what situation is remote access to a LAN needed? 74. What methods can use to implement remote access? 75. How can you access a LAN through the Internet by using a Web browser? 76. What is dial-up networking? 77. How do you create a new dial-up connection in Windows 2000/XP? 78. What does Windows 2003 Server offer for remote access? 79. What other companies offer similar remote access technologies? 80. What are the SLIP and PPP protocol? 81. What are the differences between the two? 82. Why is PPP much more popular than SLIP? Objective Activities Other Activity Read the course conference for relevant postings. Objective Activities 27

28 Unit 5: Enterprise Networking with Windows 2003 Back to top Unit Purpose and Notes: This unit introduces network operating systems, with a focus on building enterprise networks with Windows operating systems, Windows 2003 in particular. This unit is based on Chapter 8 of the TD textbook. Section 1 Section 2 Summary Unit Summary Read the chapter summary on pages of the TD textbook. Review Questions Review questions on pages of the TD textbook. Terminology Review the key terms on pages of the TD textbook. Other Activity 28

29 Unit 5 - Section 1 : Network Operating Systems Back to Unit 5 Section Goal: Provide an overview of the role and components of network operating systems. Learning Objectives Learning Objective 1 After completing this section, students should be able to discuss the functions and features of a network operating system. Objective Tasks Study Network Operating Systems, and Network Operating System Services and Features on pages of the TD textbook. Objective Leading Questions 1. What are the major functions of network operating systems? 2. What layer of the OSI model do those functions belong to? 3. What are some commonly used network operating systems? 4. How do you choose a network operating system to meet specific needs? What major factors should be considered? 5. How do you choose hardware for servers on which network operating systems will be running? 6. What services are commonly provided by network operating systems? 7. What does client support include? 8. What communication may be involved between a client and a server? 9. How does a client log onto a server? 10. What is a 3-tier architecture? 11. What is a thin client? 12. How are users and their rights managed by network operating systems? 13. What are users and user groups? 14. What are directories? 15. What file systems are used by some common network operating systems? 16. What are the main features of the FAT, FAT16, FAT32 and HPFS file systems? 17. What are the significant advantages of the client/server architecture? 18. Where are shared applications commonly installed? 19. How do network operating systems support printer sharing? 20. What are network system resources? How do network operating systems manage system resources? Summary 29

30 Objective Activities Other Activity Check Microsoft Website about their newest NOS, and compare with Server Objective Activities 30

31 Unit 5 - Section 2 : Networking with Windows Server 2003 Back to Unit 5 Section Goal: Illustrate the implementation of a Windows 2003 based network. Learning Objectives Learning Objective 1 After completing this section, students should be able to describe the main functions and features of Windows 2000 server, as well as the use of Windows 2000 to implement enterprise computer networks. Objective Tasks <>ul> Study Windows 2003 Server on pages of the TD textbook. Read articles about 2003 Server and their latest NOS, on Microsoft Website Do case projects 8-1, 8-2 and 8-3. If possible, complete hands-on project 8-1, 8-2 and 8-4. Complete the review questions and check your answers with your peers. Objective Leading Questions 1. What is the relationship between Windows 2003 Server and Windows 200 Server? 2. What are the benefits of the Windows 2003 Server network operating system? 3. What is clustering? 4. Why do people choose Windows 2003 server? 5. What hardware does Windows 2003 server require? 6. What memory model does Windows 2003 Server use? 7. What file system does Windows 2003 Server use? 8. What are the main features of the CDFS and NTFS file systems? 9. What can be done using Microsoft management console (MMC)? 10. How are servers, users, groups, and resources logically and physically related on Windows 2003 Server? 11. What is an active directory? 12. What is a schema? 13. What are Windows 2003 workgroups? 14. What is a domain on a Windows 2003 network? 15. How does Windows 2003 server organize domains? 16. How does Windows 2003 server manage the relationships between domains? 17. What are the naming conventions of Windows 2003 server? 18. What different names may each object on a Windows 2003 network have? 19. Why is it important to make a good plan before installing a NOS? Other Activity 31

32 20. What important questions should be answered in preparing for a Windows 2003 server installation? 21. What are the differences between per-server and the per seat license modes? 22. What is the process of installing a Windows 2003 Server? 23. After Windows 2003 Server is installed, what must be done in order to configure the installed server? 24. How is a domain user account created on a Windows 2003 Server? 25. How is a a group created on a Windows 2003 Server? 26. How is the permission for a directory modified? 27. For two network operating systems such as Windows 2000 server and NetWare to be fully compatible, what do they have to do? 28. What is GSNW? 29. What are the advantages of using Microsoft's Gateway Services for NetWare? 30. How does Windows 2003 server network operating system deal with interoperability with NetWare and Unix? 31. What does the directory Services Migration Tool (DSMIGRATE) do? Objective Leading Questions 32

33 Unit 6: Enterprise Networking with Unix-Type of Operating Systems Back to top Unit Purpose and Notes: This unit covers the main features of Unix operating system relevant to networking, and covers how to use Unix-type of operating systems including Linux and Mac OS X Server to implement computer networks. This unit is based on Chapter 9 of the TD textbook. Section 1 Summary Unit Summary Read the chapter summary on pages of the TD textbook. Review Questions Review questions on pages of the TD textbook. Terminology Review the key terms on pages of the TD textbook. Unit 6: Enterprise Networking with Unix-Type of Operating Systems 33

34 Unit 6 - Section 1 : Networking with Unix-type of Operating Systems Back to Unit 6 Section Goal: Provide and overview of the networking features and capabilities of the UNIX-type of operating system such as Linux. Learning Objectives Learning Objective 1 After completing this section, students should be able to discuss the history of the UNIX operating system, list and describe UNIX commands, and describe the installation and configuration of Linux for networking. Objective Tasks Read Chapter 9 of the TD textbook. Complete case projects 9-1, 9-2, 9-3 and 9-4. Complete the review questions and check your answers with your peers. Objective Leading Questions 1. In what ways does Unix differ from Windows and NetWare network operating systems? 2. What is the Unix operating system? 3. What are the differences between Unix and Linux operating systems? 4. What Unix implementations are currently available commercially or free of charge? 5. What are the common features among all versions of the Unix operating system? 6. What are proprietary UNIX operating systems? 7. What are the advantages of choosing a proprietary UNIX? 8. What are Open Source UNIX or UNIX-like operating systems? 9. Why do people choose UNIX for enterprise networking? 10. What hardware is needed for a UNIX server? 11. What are the main features of Linux? 12. What is Linux's memory model? 13. What file systems does Linux support? 14. What is Linux's common file and directory structure? 15. How does Linux provide file services? 16. How does Linux provide Internet services? 17. What questions should be asked in preparing a Linux installation? 18. What is the process to install a Linux server? 19. How are groups and users added in Linux network system? 20. How are file access permissions changed in a Linux system? 21. What tools are provided for Linux to internetwork with other network operating systems? Summary 34