Page 148 - DCAP516_COMPUTER_SECURITY

Computer Security Manmohan Sharma, Lovely Professional University

Notes Unit 12: Network Security Controls

CONTENTS
Objectives
Introduction

12.1 Comparison with Computer Security
12.2 Attributes of a Secure Network
12.3 Security Management for Networks

12.4 Network Security Controls
12.5 Summary
12.6 Keywords
12.7 Review Questions
12.8 Further Readings

Objectives

After studying this unit, you will be able to:
Understand the dynamics of network security

Comprehend the different attributes of secured network
Examine and interpret about security management of network
Familiarize with basics of network security tools and techniques

Introduction

Network security consists of the provisions made in an underlying computer network
infrastructure, policies adopted by the network administrator to protect the network and the
network-accessible resources from unauthorized access and consistent and continuous monitoring
and measurement of its effectiveness (lack) combined together.

12.1 Comparison with Computer Security

Securing network infrastructure is like securing possible entry points of attacks on a country by
deploying appropriate defense. Computer security is more like providing means to protect a
single PC against outside intrusion. The former is better and practical to protect the civilians
from getting exposed to the attacks.

The preventive measures attempt to secure the access to individual computers – the network
itself – thereby protecting the computers and other shared resources such as printers, network-
attached storage connected by the network. Attacks could be stopped at their entry points before
they spread. As opposed to this, in computer security the measures taken are focused on securing
individual computer hosts.
A computer host whose security is compromised is likely to infect other hosts connected to a
potentially unsecured network. A computer host’s security is vulnerable to users with higher
access privileges to those hosts.

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