One of a
hierarchy of privileged modes of an IT system that grants a set of access
privileges to applications and processes that are authorized to operate in a
"Protection Ring." YourDictionary, n.d. Web. 19 June 2018. <http://computer.yourdictionary.com/protection-ring>.
Protection Ring. (n.d.). Retrieved June 19th, 2018, from http://computer.yourdictionary.com/protection-ring