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Flip to reveal answersWhat is defence in depth?
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All 5 Flashcards — Network countermeasures
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Question
What is defence in depth?
Answer
Layered controls, so that **one failing does not end the matter** — assume the firewall will eventually be got past.
Question
Which single control gives the most protection?
Answer
**Multi-factor authentication.** It turns a stolen password into a failed login, and stolen passwords cause most breaches.
Question
What does a firewall not stop?
Answer
Anything **already inside**, and anything carried over a connection it was configured to **allow** — such as malware in ordinary web traffic.
Question
Why must backups be tested and offline?
Answer
An untested backup fails when needed, and one reachable from the network can be **encrypted by ransomware along with everything else**.
Question
Why can a strict policy reduce security?
Answer
People **work around** what they cannot follow — writing passwords down, using personal accounts, and not reporting mistakes.
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Full study notes for Network countermeasures
Topic 2.4 hub
Network security
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