The exhibit displays the ArubaOS-CX REST API documentation interface, which indicates that authorization is required before executing an API call (Available authorizations: cookieAuth). The "Authorize" button signifies that the user has not yet authenticated their session. To proceed, the user must log in to the switch to generate a session cookie. This cookie acts as an authentication token for all subsequent API requests made from the browser. Option B describes this necessary action of authenticating to acquire a credential (token/cookie) to use the API. While the term "Aruba passport account" is imprecise for on-premises switch authentication (which uses the local user database), the core action of collecting a token via authentication is correct and essential.

A: Switching to an older API version like v1 will not resolve an authentication issue. The problem is a lack of credentials, not an incorrect API endpoint version.

C: The ability to load the API documentation page proves that the switch's HTTPS server is already enabled and listening on the VRF being used for access.

D: While the browser must be configured to store cookies for cookieAuth to work, this is a passive prerequisite, not the active step of authenticating to solve the "unauthorized" state.

1. ArubaOS-CX 10.10 REST API Guide (5200-8207 Edition 1)

Chapter 2: "Using the REST API"

Section: "Logging in to the REST API"

Page 8. This section details the login process: "To log in to the REST API

you must send a POST request to the login resource... The switch authenticates the credentials against the local user database... The response includes a cookie that must be used in all subsequent REST API requests to the switch."

2. ArubaOS-CX 10.10 REST API Guide (5200-8207 Edition 1)

Chapter 2: "Using the REST API reference"

Section: "Using 'Try it out'"

Page 11. This section states: "To use the 'Try it out' feature

you must first log in to the switch through the Web UI. The login process creates a session cookie that is used to authenticate your requests from the API reference page." This confirms that a login action to create the cookie (token) is the required step.