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

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

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To prevent switching loops in networks with redundant switched paths
To provide a mechanism for network monitoring in switched environments
To create collision domains
To manage the VLAN database across multiple switches
To prevent routing loops in networks with redundant paths

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Computer Networking
The Internet Control Message Protocol (ICMP)

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

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