A quick and easy way to determine if a computer is available, either on the web or on your network is to “ping” them. A ping sends the target computer a small network packet to which it replies saying it received it. If you do not receive a reply, it means the target computer either:
- Is turned off.
- Is not available on the network.
- Has a firewall blocking the ping request.
You can easily send a ping in Windows by doing the following:
- Open a command prompt: Start > Run > cmd
- Enter this into the command prompt:
ping [target computer domain name or IP address]
You will then see if the target computer replies.

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