Computer Networking
Avalanche photodiode receivers can detect hits of transmitted data by receiving

300 photons
100 photons
400 photons
None of these
200 photons

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Computer Networking
The Internet Control Message Protocol (ICMP)

None of these
All of these
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
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem

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