Computer Networking
Who invented the modem?

Digital Equipment Corpn.
Apple Computers Inc.
AT & T Information Systems, USA
Wang Laboratories Ltd.
None of these

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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.

3 only
2 and 3
1 and 4
1 only

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Computer Networking
You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?

Issue the show cdp neighbors detail command on the router connected to the switch.
Issue the show ip arp command on the router connected to the switch.
Issue the show ip route command on the router connected to the switch.
Issue the show cdp neighbor command on the router connected to the switch.

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