N10-009 - Network Security - Section 4.1

Explain the importance of basic network security concepts, including the CIA triad, defence in depth, zero trust, and authentication factors.

Explain the foundational security concepts that shape network defence: the CIA triad (confidentiality, integrity, availability), defence in depth, least privilege, and zero trust. Distinguish the AAA components (authentication, authorisation, accounting) and the multifactor authentication factor categories, and recognise the role of encryption and certificates in protecting data in transit.

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