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.

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

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Computer Networking
Why does the data communication industry use the layered OSI reference model?1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.4. It encourages industry standardization by defining what functions occur at each layer of the model.

2 and 3
3 only
1 only
1 and 4

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Computer Networking
Modulation is the process of

converting digital signals to analog signals
performing data encryption.
Multiplexing various signals into high speed line signals
converting analog signals to digital signals

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Computer Networking
You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

The IOS became corrupted after the copy command was initiated.
You copied the wrong configuration into RAM.
The copy did not override the shutdown command in running-config.
You copied the configuration into flash memory instead.

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