Appendix A Network Basics

Throughout this book, I use IP address notation without much explanation. I take for granted that you understand the meaning of 192.168.0.1/24. And most likely, you probably do. However, I find that even the seasoned professional can sometimes forget the simplest information. This appendix serves as a useful reminder in those moments of brain fog when the network basics elude you. In addition to IP address notation and subnetting, this appendix reviews the OSI reference model and provides some details about IPv6.