noun
subject probe
Computing term: a probe or query used to check the status or availability of a reporting target, such as a device or service.
ネットワーク監視システムは定期的に報告対象打診を送信する。
The network monitoring system periodically sends subject probes.
Compound of 報告 (report), 対象 (target), and 打診 (probing, sounding out). The exact origin is uncertain; it appears to be a technical term formed within computing contexts.