Computer Networking
How many digits of the DNIC (Data Network Identification Code) identify the country?

first four
None of these
first six
first five
first three

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Computer Networking
The Internet Control Message Protocol (ICMP)

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

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