City Guilds Model Questions Vol1 2018 Information Technology Question 19
Practice objective / multiple choice question 19 from the 2018 City Guilds Model Questions Vol1 Information Technology examination.
A system employs three independent security controls in series: a firewall, an intrusion detection system (IDS), and authentication. - The probability that an external attack bypasses the firewall is \(0.02\). - Given it bypasses the firewall, the probability that the IDS fails to detect it is \(0.05\). - If it passes both, the probability that authentication is compromised is \(0.10\). - Independently, there is an insider threat that directly compromises authentication with probability \(0.01\). What is the overall probability that an attack results in unauthorized access?
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About This Question
This is City Guilds Model Questions Vol1 2018 Information Technology Question 19. It is one of the objective questions from the 2018 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Hard .
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