Computer Networking
Which of the followings is used in communications is referred to as unshielded twisted-pair (UTP)?

Fiber-optic cable
Coaxial cable
Twisted-pair cable
None of these

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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
allows gateways to send error a control messages to other gateways or hosts
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

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