Networking Essentials, Third Edition

Chapter 12. Network Security

Chapter Outline

12-1 Introduction

12-2 Intrusion (How an Attacker Gains Control of a Network)

12-3 Denial of Service

12-4 Security Software and Hardware

12-5 Introduction to the Virtual Private Network

Summary

Questions and Problems

Objectives

• Examine how an attacker gains control of a network

• Understand how denial of service attacks are initiated

• Examine the security software and hardware used to protect the network

• Understand the VPN technologies

Key Terms

social engineering

password cracking

dictionary attack

brute force attack

packet sniffing

IPsec

buffer overflow

netstat -a -b

virus

worm

malware

denial of service (DoS)

directed broadcast

spoof

firewall

access lists (ACLs)

packet filtering

proxy server ...