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Introduction

The purpose of this book is to explore the needs and functions of Secure Shell (SSH). We will endeavor to explain the history of the networks we use today and how they developed and expanded to a point where tighter security became increasingly more important.

We will look at how the OSI (Open Systems Interconnect) model and SSH relate to each other and also how to use the OSI model for troubleshooting network connectivity. Then we will look at the role of cryptography and the various methods of encryption from which we can draw. Once we understand the cryptography, we will then look at the actual SSH standards and how this protocol can aid in the secure transmission of controls and commands across the network. Then the various SSH platforms will be discussed and documented. The later chapters will round out the book with topics on port forwarding.


  

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