正解:D
The YANG model provided in the exhibit defines the structure for interface information, including fields for name, admin-status, if-index, and statistics. The correct XML snippet must match this structure and use the appropriate namespaces and field names as defined in the YANG model.
* Namespace: The XML must include the namespace urn:ietf:params:xml:ns:yang:ietf-interfaces and the prefix if.
* Interface Information: The XML must include elements for name, admin-status, if-index, and statistics as defined in the YANG model.
* Field Names and Values: The field names must match the YANG model (admin-status, if-index, in-octets, in-unicast-pkts).
Option D is the correct XML snippet because it accurately conforms to the YANG model. It includes the required elements and correctly uses the namespace and field names:
<interfaces-state xmlns="urn:ietf:params:xml:ns:yang:ietf-interfaces"
xmlns:if="urn:ietf:params:xml:ns:yang:ietf-interfaces">
<interface>
<name>GigabitEthernet1</name>
<admin-status>1</admin-status>
<if-index>1</if-index>
<statistics>
<in-octets>408164820</in-octets>
<in-unicast-pkts>728061</in-unicast-pkts>
</statistics>
</interface>
</interfaces-state>