Submitted by: Submitted by waroberson
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Category: Science and Technology
Date Submitted: 06/15/2012 08:18 PM
Chapter Ten
NETWORK SECURITY
This chapter describes why networks need security and how to provide it. The first step in any security plan is risk assessment, understanding the key assets that need protection and assessing the risks to each. There are a variety of steps that can be taken to prevent, detect, and correct security problems due to disruptions, destruction, and disaster, and due to unauthorized access.
Objectives
• Be familiar the major threats to network security,
• Be familiar with how to conduct a risk assessment,
• Understand how to prevent, detect, and correct disruptions, destruction, and disaster,
• Understand how to prevent, detect, and correct unauthorized access.
Chapter Outline
INTRODUCTION
Why Networks Need Security
Types of Security Threats
Network Controls
RISK ASSESSMENT
Develop a Control Spreadsheet
Identify and Document the Controls
Evaluate the Network's Security
CONTROLLING DISRUPTION, DESTRUCTION, AND DISASTER
Preventing Disruption, Destruction, and Disaster
Detecting Disruption, Destruction, and Disaster
Correcting Disruption, Destruction, and Disaster
CONTROLLING UNAUTHORIZED ACCESS
Preventing Unauthorized Access
Detecting Unauthorized Access
Correcting Unauthorized Access
SUMMARY
INTRODUCTION
Both business and government were concerned with security long before the need for computer-related security was recognized. They always have been interested in the physical protection of assets through means such as locks, barriers, and guards, but the introduction of computer processing, large databases, and the Internet has increased the need for security . Approximately 90% of the respondents to the 2000 Computer Security Institute/FBI Computer Crime and Security Survey reported that they had detected security breaches in the last 12 months. Almost 75% reported they suffered a measurable financial loss due to the security problem, with the average loss being just under $1...