Digital Evidence and Computer Crime, 3rd Edition

Chapter 21

Network Basics for Digital Investigators

Eoghan Casey

Contents

A brief history of computer networks

Technical Overview of Networks

Network Technologies

Connecting Networks Using Internet Protocols

Until recently, it was sufficient to look at individual computers as isolated objects containing digital evidence. Computing was disk-centered—collecting a computer and several disks would assure collection of all relevant digital evidence. Today, however, computing has become network-centered as more people rely on e-mail, e-commerce, and other network resources. It is no longer adequate to think about computers in isolation as many of them are connected together using various network technologies. Digital investigators/examiners must ...