Computer Networking
The Internet Control Message Protocol (ICMP)

All of these
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem
None of these
allows gateways to send error a control messages to other gateways or hosts

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Computer Networking
You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

The IOS became corrupted after the copy command was initiated.
You copied the configuration into flash memory instead.
The copy did not override the shutdown command in running-config.
You copied the wrong configuration into RAM.

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