Dependable Architechtures Flashcards

1
Q

What are the 6 attributes of a dependable system?

A
  • Availability
  • Reliability
  • Saftey
  • Confidentiality
  • Integrity
  • Maintainability
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2
Q

What is avialibility (Dependability)?

A

The likeliness that a service provided by a computer system is ready for use when invoked

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3
Q

What is reliability (Dependability)?

A

A measure of how likely the system is to provide its designated service for a specified period of time

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4
Q

What is Saftey (Dependability)?

A

The extent to which a system can operate without damaging or endangering its environment

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5
Q

What is Confidentiality (Dependability)?

A

Concerned with the nondisclosure of undue information to unauthorised entities

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6
Q

What is Integrity (Dependability)?

A

The capacity of a computer system to ensure the absence of improper alterations with regard to the withholding modification or deletion of information

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7
Q

What is Maintainability (Dependability)?

A

Defined as a function of time representing the probability that a failed computer system will be repaired in t time or less

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8
Q

What are 3 methods of providing dependability?

A
  • Fault Avoidence - develop to preven faults
  • Fault Tolerance - design system to manage faults
  • Fault detection and correction - disover and remove faults before deployment
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