, Chapter 1 r
Introduction to Data Communications r r r
True-False Questions r
The following are possible True/False questions for tests. The statement is given and the
r r r r r r r r r r r r r r
r answer is provided in square brackets. The level of difficulty (easy, moderat
r r r r r r r r r r r r r r r r r r r r r r
e, difficult) and the page number(s) relevant to the topic are also furnished.
r r r r r r r r r r r r r r r r r r
1. According to John Chambers, CEO of Cisco (a leading networking technology com
r r r r r r r r r r r
pany), the information age is the second Industrial Revolution. r r r r r r r
Answer:True Difficulty: Easy r Reference: p. 4 r
2. Due to recent advances in high speed communication networks, the information lag,
r r r r r r r r r r r r
or the r
time it takes for information to be disseminated around the world, r r r r r r r r r r
has been significantly
r r shortened. r
Answer:True Difficulty: Easy Reference: p.4
3. One perspective of data communications and networking as stated in the textbook, exa
r r r r r r r r r r r r
mines
the management of networking technologies, including security, network r r r r r r r r
design, and managing the network on a day-to-day basis and long term basis.
r r r r r r r r r r r
Answer:True Difficulty: Moderate Reference: p. 5 r
4. The first electronic data communication system was the telephone developed by Alex
r r r r r r r r r r r
ander Graham Bell. r
Answer:False Difficulty: Easy Reference: r p. 5 r
5. The first transcontinental telephone service was established in the 1940s.
r r r r r r r r r
Answer:False Difficulty: Easy Reference: r p. 6 r
6. An Inter- r
Exchange Carrier (IXC) provides only local telephone services to homes and
r r r r r r r r r r
businesses.
Answer: False Difficulty: Easy r Reference: r r r r r p. 6
r
7. Common carriers include the RBOCs, IXCs, and Cable TV companies.
r r r r r r r r r
Answer:True Difficulty: Moderate Reference: r r r r p. 7
r
8. The Telecommunications Act of 1996 now permits the RBOCs to provide long d
r r r r r r r r r r r r
istance outside the region in which they provide local telephone services.
r r r r r r r r r r
Answer: True Difficulty: Moderater Reference: p. 7 r r r r r
9. The Internet was started by the U.S. Department of defense in 1969 as a net
r r r r r r r r r r r r r r
work of four computers called ARPANET.
r r r r
Answer: True Difficulty: Moderate
r Reference: p. 9 r r r r r r
10. Telecommunications is the transmission of voice and video as well as data and r r r r r r r r r r r r r
implies transmitting a longer distance than in a data communication network.
r r r r r r r r r r r
Answer:False Difficulty: Moderate r Reference: r r r p. 11
r
,11. A local area network (LAN) connects other LANs and BNs located in different are
r r r r r r r r r r r r r
as to each r other and to wide area networks in a span from 3 to 30 miles.
r r r r r r r r r r r r r r
Answer: False Difficulty: Moderate r Reference: r p. 13 r
12. An intranet is a LAN that uses Internet technologies and is publicly ava
r r r r r r r r r r r r
ilable to people outside of the organization.
r r r r r
Answer: False Difficulty: Moderate r Reference: p. 15 r r
13. A car manufacturer may give access to certain portions of its network to some of it
r r r r r r r r r r r r r r r
s suppliers
r via Internet. This is an example of an Extranet. r r r r r r r r
Answer: True Difficulty: Moderate r Reference: p. 15 r r
14. The OSI model is the most widely used network model to develop and build net
r r r r r r r r r r r r r r
works today. r
Answer: True Difficulty: Moderate r Reference: r p. 16 r
15. The network layer is responsible for routing messages from the source co
r r r r r r r r r r r
mputer to the destination computer.
r r r
Answer: True Difficulty: Easy r Reference: p. 17 r r
16. In the OSI model, the application layer is the end user‟s access to the network.
r r r r r r r r r r r r r r
Answer: True Difficulty: Moderate
r Reference: p. 18 r r
17. The application layer is the seventh layer of the Internet model and provides the
r r r r r r r r r r r r r r
end user‟s access to the network.
r r r r
Answer: True Difficulty: Moderater Reference: p. 18 r r
18. At the transport layer in the Internet model, TCP is responsible for breaking larg
r r r r r r r r r r r r r
e files
r
received from the application layer into smaller packets and openin r r r r r r r r r
g a connection to a server
r r for transferring the packets. r r r r r r
Answer: True Difficulty: Difficultr r Reference: p. 17 r
19. Ethernet is an example of a network layer protocol.
r r r r r r r r
Answer: False Difficulty: Easy r Reference: p. 17 r r
20. Data communication standards enable each layer in the sending computer to com
r r r r r r r r r r r
municate with its corresponding layer in the receiving computer. r r r r r r r
Answer: True Difficulty: Easy r Reference: r p. 22 r
21. The specification stage of the formal standardization process consists of developi
r r r r r r r r r r
ng nomenclature and identifying the problems to be addressed. r r r r r r r
Answer: True Difficulty: Moderate r r Reference: p. 23 r
22. ANSI is a voting participant in the ISO.
r r r r r r r
Answer: True Difficulty: Easy r Reference: p. 23 r r
23. Passive optical networking, a key trend for the future, means that virtually any comp
r r r r r r r r r r r r r
uter will be able to communicate with any other computer in the world.
r r r r r r r r r r r
Answer: False r Difficulty: Moderate r Reference: p. 26 r
, 24. The high bandwidth requirements (high communications needs) for video have slow
r r r r r r r r r r
ed its r integration into computer networks. r r r
Answer: True Difficulty: Moderate
r Reference: p. 28 r r
25. An Application Service Provider (ASP) develops a specific system and companies purch
r r r r r r r r r r r
ase
or rent the service without installing the system on their own comput
r r r r r r r r r r r
ers.
Answer: True r Difficulty: Moderate r Reference: p. 29r
MULTIPLE CHOICE r
The following are possible multiple-
r r r r r r r r
choice questions for tests. The question is posed and the answer is provided
r r r r r r r r r r r r r r r r r r r r r r r r
r runder the choices. The level of difficulty (easy, moderate, difficult) and the pa
r r r r r r r r r r r r r r r r r r r r r r r r
ge number(s) relevant to the topic is also furnished.
r r r r r r r r
1. Data communications and networking can be considered as a global area of study bec
r r r r r r r r r r r r r
ause:
a. new technologies and applications emerge from a variety
of countries and spread r around the world r r
b. the technologies enable global communication
r r r r
c. the political and regulatory issues are exactly the same in every country
r r r r r r r r r r r
d. a and b
r r
e. none of the above r r r
Answer: D Difficulty: Easy
r Reference: p. 4 r r
2. In 1970, a key decision regarding MCI:
r r r r r r
a. set up the Telecommunications Competition and Deregulation Act
r r r r r r r
b. permitted MCI to provide limited long distance service in the U.S. r r r r r r r r r r
c. permitted telephone and/or computer equipment that was
not manufactured by Bell r r
Telephone to be connected to AT&T‟s network r r r r r r
d. divided AT&T into two parts: one part for long distance
r r r
service, and a second part, r
comprised of seven operating companies, for local telephone service r r r r r r r r
e. set up deregulation for international telecommunications markets in 68 cou
r r r r r r r r r
ntries
Answer: B Difficulty: Easy
r Reference: p. 6 r r
3. In 1984, a federal judge broke up a highly contested telephone service monopoly and:
r r r r r r r r r r r r r
a. set up the Telecommunications Competition and Deregulation Act
r r r r r r r
b. permitted MCI to provide limited long distance service in the U.S. r r r r r r r r r r
c. permitted telephone and/or computer equipment that was
not manufactured by r
Bell Telephone to be connected to AT&T‟s network r r r r r r r
d. divided AT&T into two parts: one part for long distance service, r r r r r r r r r r r r r r r r r r r r
and a second part, comprised of seven regional operating companies,
r r r r r r r r r r r r r r r r r
for local telephone service r r r r r r
e. set up deregulation for international telecommunications markets in 68 countrie
r r r r r r r r r
Introduction to Data Communications r r r
True-False Questions r
The following are possible True/False questions for tests. The statement is given and the
r r r r r r r r r r r r r r
r answer is provided in square brackets. The level of difficulty (easy, moderat
r r r r r r r r r r r r r r r r r r r r r r
e, difficult) and the page number(s) relevant to the topic are also furnished.
r r r r r r r r r r r r r r r r r r
1. According to John Chambers, CEO of Cisco (a leading networking technology com
r r r r r r r r r r r
pany), the information age is the second Industrial Revolution. r r r r r r r
Answer:True Difficulty: Easy r Reference: p. 4 r
2. Due to recent advances in high speed communication networks, the information lag,
r r r r r r r r r r r r
or the r
time it takes for information to be disseminated around the world, r r r r r r r r r r
has been significantly
r r shortened. r
Answer:True Difficulty: Easy Reference: p.4
3. One perspective of data communications and networking as stated in the textbook, exa
r r r r r r r r r r r r
mines
the management of networking technologies, including security, network r r r r r r r r
design, and managing the network on a day-to-day basis and long term basis.
r r r r r r r r r r r
Answer:True Difficulty: Moderate Reference: p. 5 r
4. The first electronic data communication system was the telephone developed by Alex
r r r r r r r r r r r
ander Graham Bell. r
Answer:False Difficulty: Easy Reference: r p. 5 r
5. The first transcontinental telephone service was established in the 1940s.
r r r r r r r r r
Answer:False Difficulty: Easy Reference: r p. 6 r
6. An Inter- r
Exchange Carrier (IXC) provides only local telephone services to homes and
r r r r r r r r r r
businesses.
Answer: False Difficulty: Easy r Reference: r r r r r p. 6
r
7. Common carriers include the RBOCs, IXCs, and Cable TV companies.
r r r r r r r r r
Answer:True Difficulty: Moderate Reference: r r r r p. 7
r
8. The Telecommunications Act of 1996 now permits the RBOCs to provide long d
r r r r r r r r r r r r
istance outside the region in which they provide local telephone services.
r r r r r r r r r r
Answer: True Difficulty: Moderater Reference: p. 7 r r r r r
9. The Internet was started by the U.S. Department of defense in 1969 as a net
r r r r r r r r r r r r r r
work of four computers called ARPANET.
r r r r
Answer: True Difficulty: Moderate
r Reference: p. 9 r r r r r r
10. Telecommunications is the transmission of voice and video as well as data and r r r r r r r r r r r r r
implies transmitting a longer distance than in a data communication network.
r r r r r r r r r r r
Answer:False Difficulty: Moderate r Reference: r r r p. 11
r
,11. A local area network (LAN) connects other LANs and BNs located in different are
r r r r r r r r r r r r r
as to each r other and to wide area networks in a span from 3 to 30 miles.
r r r r r r r r r r r r r r
Answer: False Difficulty: Moderate r Reference: r p. 13 r
12. An intranet is a LAN that uses Internet technologies and is publicly ava
r r r r r r r r r r r r
ilable to people outside of the organization.
r r r r r
Answer: False Difficulty: Moderate r Reference: p. 15 r r
13. A car manufacturer may give access to certain portions of its network to some of it
r r r r r r r r r r r r r r r
s suppliers
r via Internet. This is an example of an Extranet. r r r r r r r r
Answer: True Difficulty: Moderate r Reference: p. 15 r r
14. The OSI model is the most widely used network model to develop and build net
r r r r r r r r r r r r r r
works today. r
Answer: True Difficulty: Moderate r Reference: r p. 16 r
15. The network layer is responsible for routing messages from the source co
r r r r r r r r r r r
mputer to the destination computer.
r r r
Answer: True Difficulty: Easy r Reference: p. 17 r r
16. In the OSI model, the application layer is the end user‟s access to the network.
r r r r r r r r r r r r r r
Answer: True Difficulty: Moderate
r Reference: p. 18 r r
17. The application layer is the seventh layer of the Internet model and provides the
r r r r r r r r r r r r r r
end user‟s access to the network.
r r r r
Answer: True Difficulty: Moderater Reference: p. 18 r r
18. At the transport layer in the Internet model, TCP is responsible for breaking larg
r r r r r r r r r r r r r
e files
r
received from the application layer into smaller packets and openin r r r r r r r r r
g a connection to a server
r r for transferring the packets. r r r r r r
Answer: True Difficulty: Difficultr r Reference: p. 17 r
19. Ethernet is an example of a network layer protocol.
r r r r r r r r
Answer: False Difficulty: Easy r Reference: p. 17 r r
20. Data communication standards enable each layer in the sending computer to com
r r r r r r r r r r r
municate with its corresponding layer in the receiving computer. r r r r r r r
Answer: True Difficulty: Easy r Reference: r p. 22 r
21. The specification stage of the formal standardization process consists of developi
r r r r r r r r r r
ng nomenclature and identifying the problems to be addressed. r r r r r r r
Answer: True Difficulty: Moderate r r Reference: p. 23 r
22. ANSI is a voting participant in the ISO.
r r r r r r r
Answer: True Difficulty: Easy r Reference: p. 23 r r
23. Passive optical networking, a key trend for the future, means that virtually any comp
r r r r r r r r r r r r r
uter will be able to communicate with any other computer in the world.
r r r r r r r r r r r
Answer: False r Difficulty: Moderate r Reference: p. 26 r
, 24. The high bandwidth requirements (high communications needs) for video have slow
r r r r r r r r r r
ed its r integration into computer networks. r r r
Answer: True Difficulty: Moderate
r Reference: p. 28 r r
25. An Application Service Provider (ASP) develops a specific system and companies purch
r r r r r r r r r r r
ase
or rent the service without installing the system on their own comput
r r r r r r r r r r r
ers.
Answer: True r Difficulty: Moderate r Reference: p. 29r
MULTIPLE CHOICE r
The following are possible multiple-
r r r r r r r r
choice questions for tests. The question is posed and the answer is provided
r r r r r r r r r r r r r r r r r r r r r r r r
r runder the choices. The level of difficulty (easy, moderate, difficult) and the pa
r r r r r r r r r r r r r r r r r r r r r r r r
ge number(s) relevant to the topic is also furnished.
r r r r r r r r
1. Data communications and networking can be considered as a global area of study bec
r r r r r r r r r r r r r
ause:
a. new technologies and applications emerge from a variety
of countries and spread r around the world r r
b. the technologies enable global communication
r r r r
c. the political and regulatory issues are exactly the same in every country
r r r r r r r r r r r
d. a and b
r r
e. none of the above r r r
Answer: D Difficulty: Easy
r Reference: p. 4 r r
2. In 1970, a key decision regarding MCI:
r r r r r r
a. set up the Telecommunications Competition and Deregulation Act
r r r r r r r
b. permitted MCI to provide limited long distance service in the U.S. r r r r r r r r r r
c. permitted telephone and/or computer equipment that was
not manufactured by Bell r r
Telephone to be connected to AT&T‟s network r r r r r r
d. divided AT&T into two parts: one part for long distance
r r r
service, and a second part, r
comprised of seven operating companies, for local telephone service r r r r r r r r
e. set up deregulation for international telecommunications markets in 68 cou
r r r r r r r r r
ntries
Answer: B Difficulty: Easy
r Reference: p. 6 r r
3. In 1984, a federal judge broke up a highly contested telephone service monopoly and:
r r r r r r r r r r r r r
a. set up the Telecommunications Competition and Deregulation Act
r r r r r r r
b. permitted MCI to provide limited long distance service in the U.S. r r r r r r r r r r
c. permitted telephone and/or computer equipment that was
not manufactured by r
Bell Telephone to be connected to AT&T‟s network r r r r r r r
d. divided AT&T into two parts: one part for long distance service, r r r r r r r r r r r r r r r r r r r r
and a second part, comprised of seven regional operating companies,
r r r r r r r r r r r r r r r r r
for local telephone service r r r r r r
e. set up deregulation for international telecommunications markets in 68 countrie
r r r r r r r r r
