Why Security Matters
Security is one of the core responsibilities of an Azure Administrator. Every workload in the cloud needs protection from unauthorized access, misconfigurations, and external threats.
The AZ-104 exam expects you to understand both the security services in Azure and the governance practices that keep environments safe.
The Shared Responsibility Model
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Microsoft’s responsibility: Protect the underlying infrastructure (datacenters, networking, physical hardware).
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Your responsibility: Secure data, identities, applications, and configurations inside Azure.
Think of it like renting an apartment:
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The landlord secures the building.
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You lock your own doors and manage who has keys.
Core Security Principles in Azure
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Defense in Depth: Multiple layers of protection (identity, network, data, apps).
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Least Privilege: Users and apps should only have the minimum rights required.
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Zero Trust: Never trust, always verify — every access request must be authenticated and authorized.
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Visibility & Monitoring: Use monitoring tools to detect threats and misconfigurations quickly.
Key Azure Security Services (at a glance)
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Defender for Cloud: Recommendations, compliance monitoring, and threat detection.
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Key Vault: Store and manage secrets, keys, and certificates securely.
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Policies & Blueprints: Enforce rules (e.g., all storage must use encryption).
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Sentinel: Security analytics and threat response (SIEM/SOAR).
Confusion Buster 🚨
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Azure AD/Entra ID vs Azure Security Services
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Entra ID = identity management (users, roles, authentication).
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Defender, Key Vault, Sentinel = protect workloads, data, and monitor threats.
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Exam trap: If the question is about sign-in and access → Entra ID. If it’s about workload protection → Defender/Key Vault/Policies.
Simple Example
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Microsoft secures the Azure datacenter and networking backbone.
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Your company enables Defender for Cloud to get recommendations and protect VMs.
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You store app connection strings in Key Vault instead of hardcoding them.
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You enforce a Policy so that every new storage account is encrypted.
Exam Tip
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Look for keywords in the question:
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“Identity and sign-in” → Entra ID.
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“Workload protection” → Defender for Cloud.
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“Secrets/keys” → Key Vault.
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“Compliance enforcement” → Policy/Blueprints.
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Expect at least one question about shared responsibility.
What to Expect in the Exam
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Direct Q: “Who is responsible for securing data in Azure?” → The customer (you).
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Scenario: “Ensure all storage accounts are encrypted.” → Use Azure Policy.
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Trick Q: “Microsoft is responsible for patching your virtual machines.” (False — VM OS is your responsibility).