Networking Essentials

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NETWORKING ESSENTIALS, SECOND EDITION provides the fundamentals of current networking technology. This is an interactive kit designed with two primary goals in mind:
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Overview

NETWORKING ESSENTIALS, SECOND EDITION provides the fundamentals of current networking technology. This is an interactive kit designed with two primary goals in mind:
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Editorial Reviews

Booknews
This updated CD-ROM/text package prepares the reader for the Microsoft Certified Professional Exam 70-058 and highlights the Windows NT 4.0 operating system. Topics include how to decide which network standards, protocols and access methods are appropriate for the demands of a network, and how to adequately secure data on a network. A discussion of local area networks (LANs) and wide area networks (WANs) leads to an explanation of how to identify which components are needed to expand a given netork. Annotation c. by Book News, Inc., Portland, Or.
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Product Details

  • ISBN-13: 9781572315273
  • Publisher: Microsoft Press
  • Publication date: 11/4/1997
  • Series: Microsoft Training Kits Series
  • Edition description: Older Edition
  • Edition number: 2
  • Pages: 800
  • Product dimensions: 7.55 (w) x 9.54 (h) x 2.50 (d)

Read an Excerpt

Chapter 1: Network Orientation

Welcome to Chapter 1, Network Orientation. This chapter presents the concepts upon which all networking is based. In this chapter you will learn what networks are and why organizations use them. You will be introduced to the essential components common to every network and see how these components work together to deliver the benefits that have made networks an essential business tool.

You will also learn about the two primary types of networks, peer-to-peer and server-based, and the three basic ways to lay out a network.

The Case Study Problem

When you finish the lessons in Chapter 1 you will be able to apply your knowledge to determine the type of network which would be appropriate for a small insurance company that wants to install its first network.

The Troubleshooter

The Troubleshooter will point out potential problems you may encounter when a network has outgrown its initial implementation. You will then provide a possible solution for an existing network that needs a new design.

The LAN Planner

The LAN Planner will provide you with a complete check list that can help you determine your real-world needs when you design your first network.

Lesson 1: What Is Networking?

What This Lesson Does

This lesson introduces the idea of connecting computers to form a local area network (LAN).

Objectives

By the end of this lesson, you will be able to:
  • Identify the components of a local area network.
  • Describe the advantages of networking.

Estimated lesson time: 20 minutes

The Concept of Networking

At its most elementary level, a network consists of two computers connectedto each other by a cable so that they can share data. All networking, no matter how sophisticated, stems from that simple system. While the idea of two computers connected by a cable may not seem extraordinary, in retrospect, it was a major achievement in communications.

Networking arose from the need to share data in a timely fashion. Personal computers are wonderful business tools for producing data, spreadsheets, graphics, and other types of information, but do not allow you to quickly share the data you have produced. Without a network, the documents have to be printed out so that others can edit them or use them. At best, you give files on floppy disks to others to copy to their computers. If others make changes to the document there is no way to merge the changes. This was, and still is, called working in a stand-alone environment.

If the worker shown in Figure 1.1 were to connect his computer to other computers, he could share the data on the other computers and the printers. A group of computers and other devices connected together is called a network, and the concept of connected computers sharing resources is called networking.

Computers that are part of a network can share the following:

  • Data
  • Messages
  • Graphics
  • Printers
  • Fax machines
  • Modems
  • Other hardware resources
This list is constantly growing as new ways are found to share and communicate by means of computers.

Local Area Networks

Networks started out small, with perhaps ten computers connected together with a printer. The technology limited the size of the network, including the number of computers connected as well as the physical distance that could be covered by the network. For example, in the early 1980's the most popular cabling method would allow about 30 users on a maximum cable length of just over 600 feet. Such a network might be on a single floor of a building, or within one small company. For very small companies today, this configuration is still adequate. This type of network, within a limited area, is known as a local area network (LAN).

The Expansion of Networks

Early LANs could not adequately support the network needs of a large business with offices in various locations. As the advantages of networking became known, and more applications were developed for the network environment, businesses saw the need to expand their networks to remain competitive. Today LANs have become the building blocks of larger systems.

As the geographical scope of the network grows by connecting users in different cities or different states, the LAN grows into a wide area network (WAN). The number of users in a company network can now grow from ten to thousands.

Today, most major businesses store and share vast amounts of crucial data in a network environment, which is why networks are currently as essential to businesses as typewriters and filing cabinets used to be.

Q & A

Using the information presented so far, determine which of the following are LANs. Circle Yes to indicate that it is a LAN, or circle No to indicate that it is not a LAN.
  1. Three computers and a printer in the same office are all connected by a cable so that users can share the printer. Yes No
  2. Two computers in Arizona and one in New York share the same documents and electronic mail (e-mail) program. Yes No
  3. Over 150 stand-alone computers on the 47th floor of the World Trade Center in New York City all use Microsoft Word for word processing. Yes No
  4. Over 200 computers on the 14th, 15th, and 16th floors of a large office building are cabled together to share files, printers, and other resources. Yes No

Answers

  1. Yes. All components are in the same general vicinity and connected to each other.
  2. No. The computers are too far apart to be a local area network.
  3. No. The computers are stand-alone instead of connected.
  4. Yes. There may be 500 computers, but they are cabled together and are located in one building.

Why Use a Network?

Organizations implement networks primarily to share resources and enable online communication. Resources include data, applications, and peripherals. A peripheral is a device such as an external disk drive, printer, mouse, modem, or joystick. Online communication includes sending messages back and forth, or e-mail.

Printers and Other Peripherals

Before the advent of networks, people needed their own individual printers, plotters, and other peripherals. Before networks existed, the only way to share a printer was for people to take turns sitting at the computer connected to the printer.

Networks now make it possible for several people to share both data and peripherals simultaneously. If many people need to use a printer, they can all use the printer available on the network.

Data

Before networks existed, people who wanted to share information were limited to:
  • Telling each other the information (voice communication).
  • Writing memos.
  • Putting the information on a floppy disk, physically taking the disk to another computer, and then copying the data onto that computer.
Networks can reduce the need for paper communication and make nearly any type of data available to every user who needs it.

Applications

Networks can be used to standardize applications, such as a word processor, to ensure that everyone on the network is using the same application and the same version of that application. Standardizing on one applications can simplify support. It is easier to know one application very well than to try to learn four or five different applications. It is also easier to deal with only one version of an application and to set up all computers in the same manner.

Some businesses invest in networks because of e-mail and scheduling programs. Managers can use these utilities to communicate quickly and effectively with large numbers of people and to organize and schedule an entire company far more easily than was previously possible.

Q & A

Fill in the blanks in the following sentences.
  1. A primary reason for implementing a network is to _________ resources.
  2. Key resources often shared on a network include ________________ such as laser printers.
  3. Applications such as _____________ allow users to communicate quickly and effectively.

Answers

  1. share
  2. peripherals
  3. e-mail

Summary

A local area network (LAN) consists of several computers and peripherals cabled together in a limited area, such as a department of a company or a single building. Networking allows people to share resources such as files and printers, and to use interactive applications such as scheduling and e-mail.

There are many benefits to networking, including:

  • Cost cutting through sharing data and peripherals.
  • Standardization of applications.
  • Timely data acquisition.
  • More efficient communications and scheduling.
Today, networks have expanded beyond the LAN to stretch across the country and around the world into wide area networks (WANs).

Your Next Step

Now that you have had an introduction to the networking environment, you are ready to begin taking a closer look at the major networking concepts. In the next lesson you will learn about the two basic, but completely different, approaches to networking.

Lesson 2: The Two Major Types of Networks

What This Lesson Does

This lesson describes two important approaches to networking: peer-to-peer and server-based networks. It presents the major features and advantages for each. It also outlines the considerations involved in implementing servers in peer-to-peer and server-based network environments.

Objectives

By the end of this lesson, you will be able to:
  • Identify a peer-to-peer network.
  • Identify a server-based network.
  • Identify server functions and assign servers as needed.
  • Determine which type of network would be appropriate for your site.

Estimated lesson time 45 minutes

Networking Overview

In general, all networks have certain components, functions, and features in common. These include:
  • Servers—Computers that provide shared resources to network users.
  • Clients—Computers that access shared network resources provided by a server.
  • Media—The way that computers are connected.
  • Shared data—Files provided by servers across the network.
  • Shared printers and other peripherals—Other resources provided by servers.
  • Resources—Files, printers, or other items to be used by network users.
...
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Table of Contents

About This Kit ... xxvii
Content Overview ... xxix
Kit Features ... xxxi
At the Lesson Level ... xxxi
At the Chapter Level ... xxxi
Where Should You Start? ... xxxii
Chapter 1 Network Orientation ... 1
Lesson 1: What Is Networking? ... 3
Lesson 2: The Two Major Types of Networks ... 13
Exercise 1: Sharing a Directory ... 30
Exercise 2: Stop Sharing a Directory ... 31
Lesson 3: Network Design ... 33
Chapter 1 Review ... 53
Chapter 2 Connecting Network Components ... 71
Lesson 1: Network Cabling-the Physical Media ... 73
Lesson 2: Wireless Network Communications ... 104
Lesson 3: Network Adapter Cards ... 118
Chapter 2 Review ...143
Chapter 3 How a Network Functions ... 163
Lesson 1: The OSI and 802 Networking Models ... 169
Lesson 2: Drivers ... 180
Exercise 1: Installing Network Adapter Cards ... 187
Exercise 2: Deleting a Network Adapter Card Driver ... 189
Lesson 3: How Networks Send Data ... 191
Lesson 4: Protocols ... 204
Lesson 5: Putting Data on the Cable ... 222
Chapter 3 Review ... 233
Chapter 4 Network Architectures ... 249
Lesson 1: Ethernet ... 251
Lesson 2: Token Ring ... 272
Lesson 3: AppleTalk and ArcNet ... 287
Chapter 4 Review ... 299
Chapter 5 Network Operations ... 313
Lesson 1: Network Operating System Setup ... 315
Exercise 1: Installing Windows NT Server ... 339
Exercise 2: Windows NT Server Setup ... 341
Lesson 2: Network Printing ... 345
Lesson 3: Implementing Network Applications ... 358
Lesson 4: Networks in Multivendor Environments ... 385
Lesson 5: The Client/Server Environment ... 395
Chapter 5 Review ... 408
Chapter 6 Network Administration and Support ... 429
Lesson 1: Managing Network Accounts ... 431
Exercise 1: Creating a User Account ... 451
Exercise 2: Deleting a User Account ... 453
Lesson 2: Managing Network Performance ... 455
Lesson 3: Ensuring Network Data Security ... 470
Lesson 4: Avoiding Data Loss ... 486
Chapter 6 Review ... 504
Chapter 7 Larger Networks ... 531
Lesson 1: Modems in Network Communications ... 533
Lesson 2: Creating Larger Networks ... 550
Lesson 3: Wide Area Network (WAN) Transmission ... 580
Lesson 4: Advanced WAN Technologies ... 594
Chapter 7 Review ... 614
Chapter 8 Solving Network Problems ... 635
Lesson 1: Monitoring Network Behavior to Prevent Problems ... 637
Lesson 2: Network Troubleshooting ... 651
Lesson 3: The Internet: A Worldwide Resource ... 672
Chapter 8 Review ... 686
Appendix A: Common Network Standards and Specifications ... 707
Appendix B: Network Planning and Implementation ... 721
Appendix C: Network Troubleshooter ... 753
Bibliography ... 759
Glossary ... 761
Index ... 807
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  • Anonymous

    Posted November 18, 2003

    Simply the best

    If you are the beginner of networking, and want to get the basic knowledge of network, This book is for you.

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