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Difficulty: HardZero Trust Architecture Principles

A cybersecurity architect for a critical infrastructure energy provider is aligning enterprise security controls with foundational Zero Trust Architecture (ZTA) principles to protect operational technology (OT) and cloud control systems. Match each Zero Trust principle on the left with its corresponding operational security implementation on the right.

  • Assume BreachEnforcing mandatory mutual TLS (mTLS) encryption and inspecting all network traffic regardless of whether it originates inside or outside the internal network boundary.
  • Explicit VerificationEvaluating identity authentication, real-time device health posture, network location context, and risk signals before granting access to every individual data request.
  • MicrosegmentationEstablishing isolated perimeters around individual workload instances to prevent lateral movement across the network if a single host is compromised.
  • Least Privilege AccessGranting just-in-time (JIT) dynamic resource permissions scoped strictly to the minimum operations required for an active session duration.

Answer

Assume Breach pairs with enforcing mTLS encryption and inspecting all internal and external network traffic as untrusted; Explicit Verification pairs with evaluating multi-factor identity, device health, and risk signals for every request; Microsegmentation pairs with establishing isolated perimeters around individual workloads to restrict lateral movement; Least Privilege Access pairs with granting just-in-time permissions limited strictly to minimum required operations.
Each Zero Trust principle correctly aligns with its core architectural intent: Assume Breach treats internal traffic as inherently untrusted; Explicit Verification dynamically checks identity and context for every request; Microsegmentation contains threat proliferation by isolating individual workloads; and Least Privilege Access limits temporal and operational privileges to the bare minimum.

Step-by-Step Solution

1
Analyze the principle of 'Assume Breach' within Zero Trust Architecture.
Identify that assuming breach means treating internal network zones as untrusted, necessitating pervasive encryption (mTLS) and telemetry monitoring across all internal flows.
Legacy perimeter security relies on trusted internal zones, whereas Zero Trust presumes internal network segments may already harbor compromised nodes.
2
Analyze the principle of 'Explicit Verification'.
Identify that explicit verification requires continuous, multi-attribute policy evaluation (identity, device posture, location, threat context) prior to authorizing access.
Explicit verification replaces single-point-in-time authentication with dynamic, context-aware validation for every transaction.
3
Analyze the architectural concept of 'Microsegmentation'.
Identify that microsegmentation isolates workload boundaries to restrict lateral movement across network segments.
Placing fine-grained ingress and egress policy enforcement points around workloads prevents compromise propagation.
4
Analyze the principle of 'Least Privilege Access'.
Identify that least privilege access limits permissions via just-in-time elevation and tight operational scoping.
Minimizing active permissions limits potential damage if credentials or accounts are intercepted.

Key Concept

Core Zero Trust Architecture Principles and Controls
Estimated Time:2m 0s
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Topics

Zero Trust Architecture Principles

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