The goal is to retrieve (return) the configuration data for GigabitEthernet1 displayed in the JSON response.

1. HTTP Verb: The request body is N/A, which indicates a data retrieval operation, requiring the GET method.
2. URL: The base URL ends in /native/. The JSON body corresponds to the YANG model hierarchy for interface -> GigabitEthernet -> 1. Therefore, the correct URI suffix to address this specific resource is interface/GigabitEthernet/1/.
3. Headers: In a GET request, the client uses the Accept header to specify the media type it expects the server to return. The string -application/vnd.yang.data+json represents the media type, so the missing header name is Accept.

IETF RFC 8040, "RESTCONF Protocol", Section 4.1. "HTTP Methods". The document defines that the GET method is used to retrieve data for a resource.

Cisco Systems, "Programmability Configuration Guide, Cisco IOS XE", Chapter: "RESTCONF Protocol", Section: "RESTCONF Headers". This section specifies that the Accept header is used to request the format of the response data (e.g., application/vnd.yang.data+json).

Cisco Systems, "Programmability Configuration Guide, Cisco IOS XE", Chapter: "Native YANG Models". This explains the hierarchy of the native model, confirming the path structure native/interface/{interface-type}/{interface-number} (e.g., interface/GigabitEthernet/1/).