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Sometimes, you need to know whether or not packets are making it to a specific networked device. That’s where ping comes in handy. Typing “ping” followed by an IP address or web domain will send a series of test packets to the specified address. If they arrive and are returned, you know the device is capable of communicating with your PC; if it fails, you know that there’s something blocking communication between the device and your computer. This can help you decide if an issue is caused by improper configuration or a failure of network hardware.