Destination Unreachable

Destination Unreachable is a term used in computer networking to indicate that a device, such as a computer or server, cannot be reached at the intended address. This can happen for several reasons, such as the device being turned off, the address being incorrect, or problems with the network. When one device tries to send data to another and encounters such issues, it issues a Destination Unreachable message to inform the sender that their data could not be delivered. This helps troubleshoot network problems and ensures that data is handled appropriately when connections fail.