Which statement is true for Cisco IOS XE Software?

 Cisco IOS XE Software supports two main data modeling languages for its network programmability interface: RESTCONF and NETCONF. RESTCONF provides an API that uses HTTP methods for a programmatic interface over HTTP/HTTPS web services with support for both JSON and XML data formats. On the other hand, NETCONF is a protocol defined by the IETF that also provides a programmatic interface but only supports XML as its data format. Therefore, the statement that RESTCONF supports JSON and XML while NETCONF supports only XML is true. References: Automating Cisco Enterprise Solutions Official Cert Guide