Computer Networking
Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

Network operating system
Virtual Private Network
OSI
Network Server

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Computer Networking
The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband.

Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
Baseband refers to local area networks, and broadband refers to wide area networks.
Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Network collisions occur
"Line echo" occurs due to the impedance of the cable
Cable terminators do not absorb the signal properly
Repeaters cannot increase the signal strength sufficiently
Cable terminators do not reflect the signal properly

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