This 200-901 practice question tests your understanding of application deployment and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An application uses OAuth 2.0 for authorization. The developer receives an access token but needs to know the user's identity. Which OAuth flow should be used to also obtain an ID token that contains user claims?
Authorization Code Grant without PKCE
Why wrong: Without OpenID Connect, it returns only access token.
Authorization Code Grant with OpenID Connect
OpenID Connect adds ID token with user claims.
Resource Owner Password Grant
Why wrong: This is less secure and typically does not return ID tokens.
Client Credentials Grant
Why wrong: This grant is for server-to-server, no user 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
Authorization Code Grant with OpenID Connect
OpenID Connect (OIDC) is an identity layer built on top of OAuth 2.0 that adds an ID token (a JWT) containing user claims such as name, email, and sub. The Authorization Code Grant with OIDC is the correct flow because it allows the client to request both an access token and an ID token, enabling the application to verify the user's identity while obtaining authorization.
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.
Authorization Code Grant without PKCE
Why it's wrong here
Without OpenID Connect, it returns only access token.
Authorization Code Grant with OpenID Connect
Why this is correct
OpenID Connect adds ID token with user claims.
Related concept
Read the scenario before looking for a memorised answer.
Resource Owner Password Grant
Why it's wrong here
This is less secure and typically does not return ID tokens.
Client Credentials Grant
Why it's wrong here
This grant is for server-to-server, no user identity.
Common exam traps
Cisco often tests the misconception that any OAuth 2.0 flow can provide user identity, but only OpenID Connect (specifically the Authorization Code Grant with OIDC) adds the ID token for authentication; candidates may incorrectly choose the Client Credentials Grant, which is purely for machine-to-machine authorization and never includes user claims.
Detailed technical explanation
Under the hood, OIDC extends OAuth 2.0 by adding the 'openid' scope to the authorization request, which triggers the authorization server to issue an ID token alongside the access token. The ID token is a signed JWT (per OIDC Core 1.0) containing claims like 'sub' (subject identifier), 'iss' (issuer), and 'aud' (audience), which the client validates using the server's JWKS endpoint. In a real-world scenario, a single-page app using the Authorization Code Flow with PKCE and OIDC can securely authenticate users without exposing tokens in the URL fragment, while still obtaining user identity via the ID token.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
Application Deployment and Security — This question tests Application Deployment and Security — Read the scenario before looking for a memorised answer..
The correct answer is: Authorization Code Grant with OpenID Connect — OpenID Connect (OIDC) is an identity layer built on top of OAuth 2.0 that adds an ID token (a JWT) containing user claims such as name, email, and sub. The Authorization Code Grant with OIDC is the correct flow because it allows the client to request both an access token and an ID token, enabling the application to verify the user's identity while obtaining authorization.
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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