The correct command isreceiver ip address 198.51.100.10 57555 protocol tls-native profile spaces-profilebecause it matches the Cisco IOS XE model-driven telemetry subscription syntax used on Catalyst 9800 controllers. Cisco documents the receiver statement under telemetry ietf subscription as receiver ip address ip-address receiver-port protocol protocol profile name, and describes it as the command that configures the receiver IP address, port, protocol, and profile for telemetry notifications.

In the exhibit, the subscription already defines the telemetry feed: encode-tdl encoding, a native stream, the TDL URI for ewlc/wlan_config, the WLC source address, and an on-change update policy. What is missing is the collector destination. For Cisco Spaces or Catalyst Center-style integrations, the WLC must know where to export telemetry and which secure transport profile to use. Cisco troubleshooting examples for Catalyst 9800 telemetry use the same command structure: receiver ip address X.X.X.X 25103 protocol tls-native profile ... under the telemetry subscription.

Options A, B, and D are invalid because they reorder the CLI keywords. IOS XE telemetry configuration is parser-order sensitive: the command begins with receiver ip address, followed by the receiver port, then protocol, then profile. Reference topic:Wireless Monitoring and Management — Catalyst 9800 streaming telemetry, Cisco Spaces integration, TLS transport, and telemetry receiver configuration.