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The main functions of a networking device are to relay packets to their destinations, exchange and share route information between networking devices, prevent attacks of illegal or malicious packets, authenticate users and grant the right to use network resources, and so on. Thus far, a networking device has generally been thought of as a point through which data passes rather than stays at. In a dangerous environment, a node group constituting a small scale wireless network or a node operating by itself may transfer data that is almost impossible to retransfer to a server. In this case, it is possible to easily establish a reliable network and efficiently use network resources when a networking device positioned at the entrance of the Internet or the proprietary networks has a function of storing and transferring the data. The present paper discusses network storaging service and its related devices having a black box function capable of supporting transfer of an aperiodic or final message of a specific node or node group that might be lost due to an unstable network to a final server or host without any accident. The above-described networking device selects node data required to be stored in a black box, stores it in a networking device functioning black box, and transfers it in response to a request from an external device such as a host, thereby transferring an aperiodic or final message of a specific node or node group that might be lost due to an unstable network to a final server or host.