A collision occurs when multiple systems transmit simultaneously on the same wire.
Competitive Intelligence is espionage using legal, or at least not obviously illegal, means.
An organization that studies computer and network INFOSEC in order to provide incident response services to victims of attacks, publish alerts concerning vulnerabilities and threats, and offer other information to help improve computer and network security.
A collection of host computers together with the sub-network or inter-network through which they can exchange data.
Confidentiality is the need to ensure that information is disclosed only to those who are authorized to view it.