Quick Answer
The correct answer is Microsoft Entra ID authentication because it enforces tenant-level identity verification, ensuring only users and applications from your specific Entra ID tenant can call the Azure AI Language API. This works by requiring a valid OAuth 2.0 token issued by your tenant, which is obtained by a managed identity or service principal assigned the Cognitive Services User role—this role grants the token the necessary permissions to access the API endpoint. On the Microsoft Azure AI Engineer Associate AI-102 exam, this concept tests your understanding of identity-based access control versus legacy key-based or network-level methods; a common trap is confusing IP whitelists or Azure Firewall with authentication, but those only control network traffic, not user identity. Remember that API keys are shared secrets with no tenant binding, while Entra ID authentication ties access directly to your directory. A quick memory tip: “Tokens tie to tenants, keys don’t care who you are.”
This AI-102 practice question tests your understanding of plan and manage an azure ai solution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You need to enforce that only users from your Microsoft Entra ID tenant can call your Azure AI Language API endpoint. Which security mechanism should you configure?
Microsoft Entra ID authentication
Ensures only authorized tenant users can call the endpoint.
API key authentication
Why wrong: Does not enforce tenant restrictions.
IP whitelist
Why wrong: Restricts by IP address, not tenant identity.
Azure Firewall
Why wrong: Network-level control, not identity.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Microsoft Entra ID authentication
Microsoft Entra ID authentication (formerly Azure AD) allows you to enforce that only users and applications from your specific Entra ID tenant can call the Azure AI Language API. This is achieved by configuring a managed identity or service principal and assigning it the Cognitive Services User role, which ensures that tokens issued by your tenant are required for access. API keys and IP whitelists do not provide tenant-level identity enforcement, and Azure Firewall is a network-level control that does not authenticate individual users or applications.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Microsoft Entra ID authentication
Why this is correct
Ensures only authorized tenant users can call the endpoint.
Related concept
Read the scenario before looking for a memorised answer.
API key authentication
Why it's wrong here
Does not enforce tenant restrictions.
IP whitelist
Why it's wrong here
Restricts by IP address, not tenant identity.
Azure Firewall
Why it's wrong here
Network-level control, not identity.
Common exam traps
The trap here is that candidates often confuse network-level controls (IP whitelist, Azure Firewall) with identity-level controls, mistakenly thinking that restricting by IP address or network firewall is sufficient to enforce tenant-specific access, when in fact only Entra ID authentication can validate the caller's tenant membership.
Detailed technical explanation
Under the hood, Microsoft Entra ID authentication for Azure AI services uses OAuth 2.0 bearer tokens. The client must obtain an access token from the Microsoft identity platform (https://login.microsoftonline.com/{tenant-id}) by authenticating with credentials such as a managed identity, service principal, or user account. The token is then passed in the Authorization header as 'Bearer <token>', and the Azure AI Language service validates the token's issuer (iss claim) and audience (aud claim) to ensure it originates from the correct tenant. A real-world scenario is a multi-tenant application where you want to restrict access to only your organization's users; using Entra ID authentication prevents users from other tenants from calling the endpoint even if they have the API key.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Plan and manage an Azure AI solution — This question tests Plan and manage an Azure AI solution — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Entra ID authentication — Microsoft Entra ID authentication (formerly Azure AD) allows you to enforce that only users and applications from your specific Entra ID tenant can call the Azure AI Language API. This is achieved by configuring a managed identity or service principal and assigning it the Cognitive Services User role, which ensures that tokens issued by your tenant are required for access. API keys and IP whitelists do not provide tenant-level identity enforcement, and Azure Firewall is a network-level control that does not authenticate individual users or applications.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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