,Chapter 1:Introduction to Data Communications
ds d s d s d s
True-False Questions ds
The following are possible True/False questions for tests. The statement i
d s d s d s d s d s d s d s d s d s d s d s
s given and the answer
d s d s is provided in
d square
s brackets. The
d s d s d s d s d s d s d s d s d s d s d s d s d s d s
d level
s d of
s difficulty (easy,
d s dmoderate,
s difficult) andd the
s dpage s ds d s d s d s d s d s d s d s d s d s d s d
s dnumber(s) relevant to the topic are also furnished.
s d s d s d s d s d s d s ds d s
1. According to John Chambers, CEO of Cisco (a leading networking techn
d s d s d s d s d s d s d s d s d s d s
ology company), ds
the information age is the second Industrial Revolution. d s d s d s d s d s d s d s
Answer:True Difficulty: Easy ds Reference: p. d s 4
2. Due to recent advances in high speed communication networks, the infor
d s d s d s d s d s d s d s d s d s d s
mation lag, or the ds d s d s
time it takes for information to be disseminated around d s d s d s d s d s d s d s d s
the world, has been significantly
d s shortened.
ds d s d s d s
Answer:True Difficulty: Easy Reference: p.4
3. One perspective of data communications and networking as stated in the t
d s d s d s d s d s d s d s d s d s d s d s
extbook, examines ds
the management of networking technologies, including security, net d s d s d s d s d s d s d s
work design, and managing the network on a day-to-
d s d s d s d s d s d s d s
day basis and long term basis.
d s d s d s ds d s
Answer:True Difficulty: Moderate Reference: p. d s 5
4. The first electronic data communication system was the telephone developed
d s d s d s d s d s d s d s d s d s d
by Alexander
s Graham Bell.
d s d s
Answer:False Difficulty: Easy Reference: p. ds d s 5
5. The first transcontinental telephone service was established in the 1940s.
d s d s d s d s d s d s d s d s d s
Answer:False Difficulty: Easy Reference: ds p. d s 6
6. An Inter- d s
Exchange Carrier (IXC) provides only local telephone services to ho
d s d s d s d s d s d s d s d s d s
mes and businesses. d s
Answer: False Difficulty: Easy Reference:
d s p. d s d s d s d s d s d s 6
7. Common carriers include the RBOCs, IXCs, and Cable TV companies.
d s d s d s d s d s d s d s d s d s
Answer:True Difficulty: Moderate Reference: ds d s d s d s p. d s 7
8. The Telecommunications Act of 1996 now permits the RBOCs to prov
d s d s d s d s d s d s d s d s d s d s
ide long distance outside the region in which they provide local telephone
ds ds d s ds d s ds ds d s ds ds d s
services.
ds
Answer: True Difficulty: Moderate d s Reference: ds d s d s d s p. d s 7
9. The Internet was started by the U.S. Department of defense in
d s d s d s d s d s d s d s d s d s d s d s
1969 as a network of four computers called ARPANET.
d s d s ds d s d s d s ds
Answer: True Difficulty: Moderate d s Reference: d s d s d s d s d s p. d s 9
10. Telecommunications is the transmission of voice and video as well d s d s d s d s d s d s d s d s d s d s
as data and implies transmitting a longer distance than in a data com
d s ds d s d s d s d s d s d s d s d s d s d s d s
munication network. ds
,Answer:False Difficulty: Moderate
ds Reference: d s d s d s p.
d s 11
, 11. A local area network (LAN) connects other LANs and BNs located i
ds d s d s d s d s d s d s d s d s d s d s
n different areas to each
d s ds d s d s
other and to wide area networks in a span from 3 d s d s d s d s d s d s d s d s d s d s
d to 30 miles.
s d s ds
Answer: False Difficulty: Moderate
d s Reference: ds p. d s 13
12. An intranet is a LAN that uses Internet technologies and i
d s d s d s d s d s d s d s d s d s d s
s publicly available to people outside of the organization.
d s ds d s d s d s d s d s
Answer: False Difficulty: Moderate
d s Reference: p. 15 ds d s
13. A car manufacturer may give access to certain portions of its networ
d s d s d s d s d s d s d s d s d s d s d s
k to some of its suppliers
d s d s ds d s d s
via Internet. This is an example of an Extranet. d s d s d s d s d s d s d s d s
Answer: True Difficulty: Moderate
d s Reference: p. ds d s 15
14. The OSI model is the most widely used network model to develop
d s d s d s d s d s d s d s d s d s d s d s
d and build networks today.
s d s ds d s
Answer: True Difficulty: Moderate
d s Reference: ds p. d s 16
15. The network layer is responsible for routing messages from th
d s d s d s d s d s d s d s d s d s
e source computer to the destination computer.
d s ds d s d s d s
Answer: True Difficulty: Easy d s ds Reference: p. 17d s
16. In the OSI model, the application layer is the end user‟s
d s d s d s d s d s d s d s d s d s d s d s access to the d s d s d s networ
k.
Answer: True Difficulty: Moderate
d s Reference: ds p. d s 18
17. The application layer is the seventh layer of the Internet model
d s d s d s d s d s d s d s d s d s d s d s an
d provides the end user‟s
d s access to the network. ds d s d s d s d s d s
Answer: True Difficulty: Moderate
d s Reference: p. ds d s 18
18. At the transport layer in the Internet model, TCP is responsible for
d s d s d s d s d s d s d s d s d s d s d s
d breaking large files
s ds d s
received from the application layer into smaller packets an d s d s d s d s d s d s d s d s
d opening a connection to a server for transferring the packets.
ds d s d s d s d s d s d s d s d s
Answer: True d s Difficulty: Difficult d s Reference: p. d s 17
19. Ethernet is an d s d s d s example of a network layer protocol.
d s d s d s d s d s
Answer: False Difficulty: Easy
d s Reference: p. ds d s 17
20. Data communication standards enable each layer in the sending comput
d s d s d s d s d s d s d s d s d s
er to communicate
d s ds
with its corresponding layer in the receiving computer. d s d s d s d s d s d s d s
Answer: True Difficulty: Easy
d s Reference: d s p. d s 22
21. The specification stage of the formal standardization process consists of
d s d s d s d s d s d s d s d s d s
d sdeveloping
nomenclature and identifying the problems to be addr d s d s d s d s d s d s d s
essed.
Answer: True Difficulty: Moderate
d s d s Reference: p. d s 23
22. ANSI is a voting participant in the ISO.
d s d s d s d s d s d s d s
Answer: True d s Difficulty: Easy d s Reference: p. 23 d s
23. Passive optical d s d s networking, a key trend d s d s d s d s for d s the d s future, means that virt d s d s d s
ds d s d s d s
True-False Questions ds
The following are possible True/False questions for tests. The statement i
d s d s d s d s d s d s d s d s d s d s d s
s given and the answer
d s d s is provided in
d square
s brackets. The
d s d s d s d s d s d s d s d s d s d s d s d s d s d s
d level
s d of
s difficulty (easy,
d s dmoderate,
s difficult) andd the
s dpage s ds d s d s d s d s d s d s d s d s d s d s d
s dnumber(s) relevant to the topic are also furnished.
s d s d s d s d s d s d s ds d s
1. According to John Chambers, CEO of Cisco (a leading networking techn
d s d s d s d s d s d s d s d s d s d s
ology company), ds
the information age is the second Industrial Revolution. d s d s d s d s d s d s d s
Answer:True Difficulty: Easy ds Reference: p. d s 4
2. Due to recent advances in high speed communication networks, the infor
d s d s d s d s d s d s d s d s d s d s
mation lag, or the ds d s d s
time it takes for information to be disseminated around d s d s d s d s d s d s d s d s
the world, has been significantly
d s shortened.
ds d s d s d s
Answer:True Difficulty: Easy Reference: p.4
3. One perspective of data communications and networking as stated in the t
d s d s d s d s d s d s d s d s d s d s d s
extbook, examines ds
the management of networking technologies, including security, net d s d s d s d s d s d s d s
work design, and managing the network on a day-to-
d s d s d s d s d s d s d s
day basis and long term basis.
d s d s d s ds d s
Answer:True Difficulty: Moderate Reference: p. d s 5
4. The first electronic data communication system was the telephone developed
d s d s d s d s d s d s d s d s d s d
by Alexander
s Graham Bell.
d s d s
Answer:False Difficulty: Easy Reference: p. ds d s 5
5. The first transcontinental telephone service was established in the 1940s.
d s d s d s d s d s d s d s d s d s
Answer:False Difficulty: Easy Reference: ds p. d s 6
6. An Inter- d s
Exchange Carrier (IXC) provides only local telephone services to ho
d s d s d s d s d s d s d s d s d s
mes and businesses. d s
Answer: False Difficulty: Easy Reference:
d s p. d s d s d s d s d s d s 6
7. Common carriers include the RBOCs, IXCs, and Cable TV companies.
d s d s d s d s d s d s d s d s d s
Answer:True Difficulty: Moderate Reference: ds d s d s d s p. d s 7
8. The Telecommunications Act of 1996 now permits the RBOCs to prov
d s d s d s d s d s d s d s d s d s d s
ide long distance outside the region in which they provide local telephone
ds ds d s ds d s ds ds d s ds ds d s
services.
ds
Answer: True Difficulty: Moderate d s Reference: ds d s d s d s p. d s 7
9. The Internet was started by the U.S. Department of defense in
d s d s d s d s d s d s d s d s d s d s d s
1969 as a network of four computers called ARPANET.
d s d s ds d s d s d s ds
Answer: True Difficulty: Moderate d s Reference: d s d s d s d s d s p. d s 9
10. Telecommunications is the transmission of voice and video as well d s d s d s d s d s d s d s d s d s d s
as data and implies transmitting a longer distance than in a data com
d s ds d s d s d s d s d s d s d s d s d s d s d s
munication network. ds
,Answer:False Difficulty: Moderate
ds Reference: d s d s d s p.
d s 11
, 11. A local area network (LAN) connects other LANs and BNs located i
ds d s d s d s d s d s d s d s d s d s d s
n different areas to each
d s ds d s d s
other and to wide area networks in a span from 3 d s d s d s d s d s d s d s d s d s d s
d to 30 miles.
s d s ds
Answer: False Difficulty: Moderate
d s Reference: ds p. d s 13
12. An intranet is a LAN that uses Internet technologies and i
d s d s d s d s d s d s d s d s d s d s
s publicly available to people outside of the organization.
d s ds d s d s d s d s d s
Answer: False Difficulty: Moderate
d s Reference: p. 15 ds d s
13. A car manufacturer may give access to certain portions of its networ
d s d s d s d s d s d s d s d s d s d s d s
k to some of its suppliers
d s d s ds d s d s
via Internet. This is an example of an Extranet. d s d s d s d s d s d s d s d s
Answer: True Difficulty: Moderate
d s Reference: p. ds d s 15
14. The OSI model is the most widely used network model to develop
d s d s d s d s d s d s d s d s d s d s d s
d and build networks today.
s d s ds d s
Answer: True Difficulty: Moderate
d s Reference: ds p. d s 16
15. The network layer is responsible for routing messages from th
d s d s d s d s d s d s d s d s d s
e source computer to the destination computer.
d s ds d s d s d s
Answer: True Difficulty: Easy d s ds Reference: p. 17d s
16. In the OSI model, the application layer is the end user‟s
d s d s d s d s d s d s d s d s d s d s d s access to the d s d s d s networ
k.
Answer: True Difficulty: Moderate
d s Reference: ds p. d s 18
17. The application layer is the seventh layer of the Internet model
d s d s d s d s d s d s d s d s d s d s d s an
d provides the end user‟s
d s access to the network. ds d s d s d s d s d s
Answer: True Difficulty: Moderate
d s Reference: p. ds d s 18
18. At the transport layer in the Internet model, TCP is responsible for
d s d s d s d s d s d s d s d s d s d s d s
d breaking large files
s ds d s
received from the application layer into smaller packets an d s d s d s d s d s d s d s d s
d opening a connection to a server for transferring the packets.
ds d s d s d s d s d s d s d s d s
Answer: True d s Difficulty: Difficult d s Reference: p. d s 17
19. Ethernet is an d s d s d s example of a network layer protocol.
d s d s d s d s d s
Answer: False Difficulty: Easy
d s Reference: p. ds d s 17
20. Data communication standards enable each layer in the sending comput
d s d s d s d s d s d s d s d s d s
er to communicate
d s ds
with its corresponding layer in the receiving computer. d s d s d s d s d s d s d s
Answer: True Difficulty: Easy
d s Reference: d s p. d s 22
21. The specification stage of the formal standardization process consists of
d s d s d s d s d s d s d s d s d s
d sdeveloping
nomenclature and identifying the problems to be addr d s d s d s d s d s d s d s
essed.
Answer: True Difficulty: Moderate
d s d s Reference: p. d s 23
22. ANSI is a voting participant in the ISO.
d s d s d s d s d s d s d s
Answer: True d s Difficulty: Easy d s Reference: p. 23 d s
23. Passive optical d s d s networking, a key trend d s d s d s d s for d s the d s future, means that virt d s d s d s
