Race Condition - A race condition exploits the small window of time between a security control being applied and when the service is used.
Request for Comment (RFC) - A series of notes about the Internet, started in 1969 (when the Internet was the ARPANET). An Internet Document can be submitted to the IETF by anyone, but the IETF decides if the document becomes an RFC. Eventually, if it gains enough interest, it may evolve into an Internet standard.
Risk Averse - Avoiding risk even if this leads to the loss of opportunity. For example, using a (more expensive) phone call vs. sending an e-mail in order to avoid risks associated with e-mail may be considered "Risk Averse"
Root kit - A group of software programs and files designed to gain unauthorized root access to a computer.
Router - Routers interconnect logical networks by forwarding information to other networks based upon IP addresses.
Routing Loop - A routing loop is where two or more poorly configured routers repeatedly exchange the same packet over and over.
Rule Set Based Access Control (RSBAC) - Rule Set Based Access Control targets actions based on rules for entities operating on objects.