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Chapter 9 Questions
True/False
Indicate whether the sentence or statement is true or false.
1. Although some cybercafés charge a per-hour or per-minute fee, most provide free Internet access.
2. The last and least used application of GPS (global positioning system) technology is to assist people with determining
where they are located.
3. An intranet essentially is a small version of the Internet that exists within an organization.
4. With TCP/IP, each packet contains data as well as the recipient (destination), origin (sender), and the sequence
information used to reassemble the data at the destination.
5. Nearly the entire telephone network today uses analog technology, with the exception of the final link from the local
telephone company to a home, which is digital.
6. Dedicated lines can be either analog or digital.
7. A dial-up modem usually is in the form of an adapter card that is inserted in an expansion slot on a computer’s
motherboard.
8. To prevent unauthorized users from accessing files and computers, many routers are protected by built-in firewalls.
9. Home networking saves the home user money and provides many conveniences.
10. One of the more widely used transmission media for network cabling and telephone systems is twisted-pair cable.
11. Fiber-optic cable is cheaper than twisted-pair or coaxial, but it is easier to install and modify.
12. Infrared (IR) is a wireless transmission medium that sends signals using infrared light waves.
13. With satellite Internet connections, uplink transmissions usually are faster than downlink transmissions.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
14. Two examples of _____ are cable television lines and telephone lines.
a. sending devices
c. receiving devices
b. communications channels
d. communications devices
15. Businesses are the primary users of _____ because this technology provides a means for departments to communicate
with each other, suppliers, vendors, and with clients.
a. groupware
c. global positioning systems
b. Web services
d. short message services
16. Each computer or device on a local area network, called a _____, often shares resources such as printers, large hard
disks, and programs.
a. hub
c. token
b. server
d. node
17. A _____ is a network that covers a large geographic area, such as a city, country, or the world, using a
communications channel that combines many types of media.
a. local area network (LAN)
c. wide area network (WAN)
b. metropolitan area network (MAN)
d. variable area network (VAN)
18. Today, _____ is the most popular LAN technology because it is relatively inexpensive and easy to install and
maintain.
a. Ethernet
c. TCP/IP
b. token ring
d. 802.11
19. The technique of breaking a message into individual packets, sending the packets along the best route available, and
then reassembling the data is called _____.
a. packet catching
c. packet switching
b. packet building
d. packet swapping
20. DSL is much _____ data transfer rates.
a. harder to install than ISDN and provides much slower
b. harder to install than ISDN but provides much faster
c. easier to install than ISDN but provides much slower
d. easier to install than ISDN and provides much faster
21. For data transmission to occur, _____ of a standard telephone line must have a dial-up modem.
a. only the sending end
c. both the sending and receiving ends
b. only the receiving end
d. neither the sending nor receiving end
22. A _____ is a device that provides a central point for cables in a network.
a. hub
c. node
b. packet
d. router
23. A(n) _____ extends the basic home network to include features such as lighting control, thermostat adjustment, and a
security system.
a. peripheral home network
c. wired home network
b. value-added home network
d. intelligent home network
24. Fiber-optic cables have all of the following advantages over cables that use wire except _____.
a. lower costs and easier installation and modification
b. faster data transmission and smaller size
c. less susceptible to noise from other devices
d. better security for signals during transmission
25. Microwave transmission, sometimes called _____, involves sending signals from one microwave station to another.
a. line-of-sight transmission
c. out-of-sight transmission
b. flexed-point wireless
d. fixed wireless
Chapter 9
Answer Section
TRUE/FALSE
1.
2.
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4.
5.
6.
7.
8.
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F
F
T
T
F
T
T
T
T
T
F
T
F
DIF:
DIF:
DIF:
DIF:
DIF:
DIF:
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DIF:
DIF:
DIF:
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DIF:
DIF:
P
P
S
S
S
P
S
S
P
P
P
S
S
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464
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477
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OBJ:
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3
3
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11
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11
DIF:
DIF:
DIF:
DIF:
DIF:
DIF:
DIF:
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DIF:
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DIF:
DIF:
P
S
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P
P
S
S
S
S
S
P
S
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461
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471
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477
482
485
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493
495
OBJ:
OBJ:
OBJ:
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OBJ:
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2
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MULTIPLE CHOICE
14.
15.
16.
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25.
ANS:
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B
B
D
C
A
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C
A
D
A
D