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 is secured using OAuth 2.0 for Cisco Webex API access. Which three components are involved in the authorization code grant flow? (Choose three.)
Client Secret
Client Secret authenticates the application.
Client ID
Client ID identifies the application to the authorization server.
Authorization Code
Authorization code is exchanged for an access token.
Refresh Token
Why wrong: Refresh token is used to obtain new access tokens after expiry, but is not part of the initial authorization code flow.
API Key
Why wrong: API keys are not used in standard OAuth 2.0 flows.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Client Secret
The authorization code grant flow in OAuth 2.0 requires the client to present its Client ID and Client Secret to authenticate itself to the authorization server. The flow begins by requesting an authorization code, which is then exchanged for an access token. The three components explicitly involved in this exchange are the Client Secret (A), Client ID (B), and Authorization Code (C).
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.
Client Secret
Why this is correct
Client Secret authenticates the application.
Related concept
Read the scenario before looking for a memorised answer.
Client ID
Why this is correct
Client ID identifies the application to the authorization server.
Related concept
Read the scenario before looking for a memorised answer.
Authorization Code
Why this is correct
Authorization code is exchanged for an access token.
Related concept
Read the scenario before looking for a memorised answer.
Refresh Token
Why it's wrong here
Refresh token is used to obtain new access tokens after expiry, but is not part of the initial authorization code flow.
API Key
Why it's wrong here
API keys are not used in standard OAuth 2.0 flows.
Common exam traps
Cisco often tests the distinction between the components used in the initial authorization code grant flow versus those used in subsequent token refresh, causing candidates to incorrectly include the Refresh Token as a required component of the initial flow.
Detailed technical explanation
In the authorization code grant flow (RFC 6749 Section 4.1), the client first redirects the user to the authorization server with its Client ID and requested scopes. After the user authenticates and consents, the server returns an authorization code to the client, which then sends a POST request (including the Client ID, Client Secret, and authorization code) to the token endpoint to receive an access token. The Client Secret is a shared secret stored securely on the client and server, used to verify the client's identity during this token exchange.
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: Client Secret — The authorization code grant flow in OAuth 2.0 requires the client to present its Client ID and Client Secret to authenticate itself to the authorization server. The flow begins by requesting an authorization code, which is then exchanged for an access token. The three components explicitly involved in this exchange are the Client Secret (A), Client ID (B), and Authorization Code (C).
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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