11.9. Ping an IP Address
Problem
You want to check to see whether a computer is online and accessible and gauge its response time.
Solution
Send a ping message. This message is sent using the ICMP, accessible through the Send method of the System.Net.NetworkInformation.Ping class.
How It Works
A ping message contacts a device at a specific IP address, passing it a test packet, and requests that the remote device respond by echoing back the packet. To gauge the connection latency between two computers, you can measure the time taken for a ping response to be received.
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