Dependable Architechtures Flashcards
What are the 6 attributes of a dependable system?
- Availability
- Reliability
- Saftey
- Confidentiality
- Integrity
- Maintainability
What is avialibility (Dependability)?
The likeliness that a service provided by a computer system is ready for use when invoked
What is reliability (Dependability)?
A measure of how likely the system is to provide its designated service for a specified period of time
What is Saftey (Dependability)?
The extent to which a system can operate without damaging or endangering its environment
What is Confidentiality (Dependability)?
Concerned with the nondisclosure of undue information to unauthorised entities
What is Integrity (Dependability)?
The capacity of a computer system to ensure the absence of improper alterations with regard to the withholding modification or deletion of information
What is Maintainability (Dependability)?
Defined as a function of time representing the probability that a failed computer system will be repaired in t time or less
What are 3 methods of providing dependability?
- Fault Avoidence - develop to preven faults
- Fault Tolerance - design system to manage faults
- Fault detection and correction - disover and remove faults before deployment