Exam 6: Data Communications

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What is a VPN and how does it work? Give an example of how it is used in business.

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VPN stands for a "virtual private network." This is one alternative to a WAN.A VPN takes advantage of the Internet or leased lines to create the appearance of private,point -to -point connections.Being "virtual" simply means that it appears to exist to the users,but does not actually exist.In business,if a manufacturer needs to maintain a steady connection to their suppliers,they might set up a VPN with them.This is because they are more stable and offer much better security,yet they are relatively inexpensive and quite flexible and easy to set up.

A(n)__________ provides you with a legitimate Internet address and serves as your gateway to the Internet.

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A(n)___________ is a network of networks.

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Computers at different geographic locations are connected with a(n)__________ .

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Broadband lines include dial -up and cable modems.

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DSL is implemented in ___________ media.

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Many organization use collaboration because

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ISPs are rarely willing to make performance guarantees that commit them to levels of network service quality.

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100 Mbps stands for

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A computer___________ is a collection of computers that communicate with one another over transmission lines.

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The Internet has probably decreased the number of degrees that separate us from everyone else.Why is this so? Could it also increase our separation? Why or why not?

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The fastest WLAN standard in use today is 802.11n.

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Narrowband transmission speeds typically do not exceed 56 kbps.

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Twisted pair copper lines are used with DSL modems.

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Describe two different WAN alternatives.

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Networks like LinkedIn are not limited in their growth.

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Which of the following applies to asymmetric encryption?

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HTTPS is a protocol for secure communication over the Internet.

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The difference between a SDSL connection and a ADSL connection is

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By expanding your personal professional network on LinkedIn

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