A 401 Unauthorized error indicates that the request has not been applied because it lacks valid authentication credentials for the target resource. To resolve this error when making an HTTP GET request to retrieve data using RESTCONF on a CSR 1000V, you need to ensure that the correct authentication credentials (username and password) are provided.
[Reference:, Cisco DevNet Associate Certification Guide: Chapter on REST APIs and Authentication Mechanisms., HTTP/1.1 documentation: Status Code Definitions from the W3C., ]
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