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A Guide to Network Gadgets that Contain Ping, NTP, TFTP, and Iperf. RT-Thread NetUtils component is created based on the commonly used network tools. It is useful in ping commands for testing debugging; NTP tools for time sync; IperF, NetIO for performance and bandwidth testing; and lightweight file transfer tool TFTP that is widely used in embedded systems, to easily transfer files between two devices over the network. The Ping tool needs to enable the lwIP dependency in the Env tool before it can be seen.