To get the most out of this book

To understand the content of this book, it is recommended that you have basic knowledge of computer networks. If you are certified with CCNA network and security, that will be a good foundation for you to advance your knowledge about computer networks by reading this book.

As you know, it does not make sense to learn about computer networks without doing any practical work. Therefore, it is suggested that you practice TCP/IP, IP Packet Flow, Basic network design and setting up a LAN with at least a Cisco switch and router. Download emulators and simulators such as PuTTY and Tera Term, Packet Tracer and GNS3, Wireshark, Nmap, Nessus. All of the download links are included in the book.