Network Design

CHAPTER CONTENTS

1.1 1.2 1.3 1.4 Objectives Preparation Background Overview of Analysis, Architecture, and Design Processes 1.4.1 Hierarchy and Interconnectivity 1.4.2 Importance of Network Analysis 1.4.3 Model for Network Analysis, Architecture, and Design A Systems Methodology System Description Service Description Service Characteristics 1.8.1 Service Levels 1.8.2 System Components and Network Services 1.8.3 Service Requests and Requirements 1.8.4 Service Offerings 1.8.5 Service Metrics Performance Characteristics 1.9.1 Capacity 1.9.2 Delay RMA 1.9.3 1.9.4 Performance Envelopes Network Supportability Conclusion Exercises

1.5 1.6 1.7 1.8

1.9

1.10 1.11 1.12

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CHAPTER 1

Introduction

We begin this book with an introduction to the analysis, architecture, and design processes. Many concepts and terms that are used throughout this book are introduced and defined in this chapter. Some of these concepts may be new to you while others are presented in a different light. Glossaries of terms and acronyms are provided at the end of this book for easy reference.

1.1 Objectives

The objectives of this chapter are to: 1. Introduce the fundamental concepts of this book; the processes of network analysis, architecture, and design; systems and services; as well as their characteristics Define several terms used throughout the book Prepare the reader for the analysis process

2. 3.

1.2 Preparation

To be able to understand and apply the concepts in this chapter, you should be familiar with basic networking concepts, including functions and features of the TCP/IP protocol suite; technologies such as Ethernet, Fast Ethernet, Gigabit Ethernet, asynchronous transfer mode (ATM), synchronous optical network (SONET), and frame

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CHAPTER 1

Introduction

relay; and the basics of network performance. Some recommended sources of information include: • • • • • TCP/IP Illustrated, volume 1, by W. Richard Stevens, Addison-Wesley Publishing, January 1994 Essentials of ATM Networks...