GSEC GIAC Security Essentials Certification All-in-One Exam Guide, Second Edition, 2nd Edition

CHAPTER 2

Networking Fundamentals

In this chapter, you will learn:

•   Network protocols and the OSI communication model

•   TCP/IP design and functionality

•   Network addressing

•   Name resolution

Before we go anywhere, we need to talk about networking fundamentals. Too much of what comes ahead relies on a solid understanding of networking protocols. It can help to think about networking conceptually by breaking the functionality into chunks. When you have a clear understanding of a protocol’s role and where it fits in the collection of protocols, sometimes called a network stack, you will have an easier time putting everything together. There are a lot of moving pieces in any given network communication. You’ll need to understand how it’s ...