Introduction to Data Communications lk lk lk
True-False Questions lk
The following are possible True/False questions for tests. The statement is given and
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the answer is provided in square brackets. The level of difficulty (easy, moderate,
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difficult) and the page number(s) relevant to the topic are also furnished.
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1. According to John Chambers, CEO of Cisco (a leading networking technology
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lk company), the information age is the second Industrial Revolution.
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Answer:True Difficulty: Easy lk Reference: l k p. 4 lk
2. Due to recent advances in high speed communication networks, the information
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lk lag, or the time it takes for information to be disseminated around the world,
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lk has been significantly shortened.
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Answer:True Difficulty: Easy lk Reference: l k p.4
3. One perspective of data communications and networking as stated in the textbook,
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lk examines the management of networking technologies, including security,
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lk network design, and managing the network on a day-to-day basis and long term
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lk basis.
Answer:True Difficulty: Moderate lk Reference: l k p. 5 lk
4. The first electronic data communication system was the telephone developed by
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Alexander Graham Bell.
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Answer:False Difficulty: Easy lk Reference: l k p. 5 lk
5. The first transcontinental telephone service was established in the 1940s.
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Answer:False Difficulty: Easy lk Reference: l k p. 6 lk
6. An Inter-Exchange Carrier (IXC) provides only local telephone services to
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lk homes and businesses. lk lk
Answer: False lk Difficulty: Easy lk Reference: l k p. 6 lk
7. Common carriers include the RBOCs, IXCs, and Cable TV companies.
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Answer:True Difficulty: Moderate lk Reference: l k p. 7 lk
,8. The Telecommunications Act of 1996 now permits the RBOCs to provide long
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distance outside the region in which they provide local telephone services.
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Answer: True lk Difficulty: Moderate lk Reference: l k p. 7
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9. The Internet was started by the U.S. Department of defense in 1969 as a
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network of four computers called ARPANET.
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Answer: True lk Difficulty: Moderate lk Reference: l k p. 9
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10. Telecommunications is the transmission of voice and video as well as data
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and implies transmitting a longer distance than in a data communication
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lk network.
Answer:False Difficulty: Moderate lk Reference: l k p. 11
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, 11. A local area network (LAN) connects other LANs and BNs located in different
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areas to each other and to wide area networks in a span from 3 to 30 miles.
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Answer: False lk Difficulty: Moderate lk Reference: l k p. 13 lk
12. An intranet is a LAN that uses Internet technologies and is publicly available
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to people outside of the organization.
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Answer: False lk Difficulty: Moderate lk Reference: l k p. 15 lk
13. A car manufacturer may give access to certain portions of its network to some of its
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suppliers via Internet. This is an example of an Extranet.
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Answer: True lk Difficulty: Moderate lk Reference: l k p. 15 lk
14. The OSI model is the most widely used network model to develop and build networks
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lk today.
Answer: True lk Difficulty: Moderate lk Reference: l k p. 16 lk
15. The network layer is responsible for routing messages from the source
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computer to the destination computer.
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Answer: True lk Difficulty: Easy lk Reference: l k p. 17 lk
16. In the OSI model, the application layer is the end user‟s access to the network.
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Answer: True lk Difficulty: Moderate lk Reference: l k p. 18 lk
17. The application layer is the seventh layer of the Internet model and provides the
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end user‟s access to the network.
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Answer: True lk Difficulty: Moderate lk Reference: l k p. 18 lk
18. At the transport layer in the Internet model, TCP is responsible for breaking large
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lk files received from the application layer into smaller packets and opening a
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connection to a server for transferring the packets.
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Answer: True lk Difficulty: Difficult lk Reference: l k p. 17 lk
19. Ethernet is an example of a network layer protocol.
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Answer: False lk Difficulty: Easy lk Reference: l k p. 17 lk
20. Data communication standards enable each layer in the sending computer to
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communicate with its corresponding layer in the receiving computer.
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Answer: True lk Difficulty: Easy lk Reference: l k p. 22 lk