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