ABSTRACT
The Center for Internet Security has network security as their 9th control and covers the basics. There are two kinds of networks, physical and software. Some would argue that there is a third, the wireless network, but a wireless network is a form of a software network. Understanding the differences is important, as each has their own unique security challenges and role in security architecture. The software-defined network places computer on an isolated network that permits system only sufficient access to correct the issues with the policy. Modern software-defined networks can do more than just place system onto a defined subnet. They can allow connection to specific destinations and deny connections to other destinations, even if all of the devices in question are on the same physical subnet. When looking at software-defined networking products insist on strict adherence to standards and insist on only implementing features that are addressable through the standards.
