ix
Contents
Chapter 1
Design Overview
3
How to Best Use This Chapter
3
"Do I Know This Already?" Quiz
4
Foundation Topics
7
Defining the Problem
7
Internetwork Design Goals
8
Seven Steps for Designing Internetworks
9
Gather Information
9
Analyze Requirements
10
Develop the Internetwork Structure
11
Estimate Network Performance
11
Assess Costs and Risks
12
Implement and Monitor
12
Cost Versus Availability
13
Concerns Facing Designers
13
Disaster Recovery
13
Establish Priorities for Your Network and Applications
14
Assess Network Resiliency
14
Redundant Power Systems
15
Fault-Tolerant Media Implementations
15
Backup Hardware
16
Controlling Broadcasts
17
Strategic Internetwork Design
17
Design Models
17
The Flat Earth Model
18
The Star and Ring Models
18
The Two-Tier Model
20
The Mesh Network
20
Hierarchical Design
22
The Core Layer
23
The Distribution Layer
23
The Access Layer
25
Other Design Models
26
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