Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Communications signals represented in a binary
format are said to be ________.
a. | continuous | c. | sequential | b. | digital | d. | analog |
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2.
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Signals such as sound and temperature, which
continuously vary in strength and quality, are said to be ________.
a. | spontaneous | c. | sequential | b. | digital | d. | analog |
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3.
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The ________ is a device that converts digital
computer signals into analog signals so that they can be sent over a telephone
line.
a. | printer | c. | modem | b. | scanner | d. | digitizer |
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4.
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Each zero and one signal represents a
________.
a. | bit | c. | kilobyte | b. | byte | d. | megabyte |
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5.
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Which of the following is NOT an analog
device?
a. | speedometer | c. | thermometer | b. | tire-pressure gage | d. | computer |
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6.
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A person sending a document over a phone line by
converting digital signals to analog signals uses a ________.
a. | printer | c. | digitizer | b. | scanner | d. | modem |
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7.
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The wire channel, consisting of two strands of
insulated copper wire, is known as ________.
a. | Twisted-pair | c. | fiber-optic | b. | coaxial | d. | straight wire |
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8.
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A virtual private network may include
________.
a. | a company intranet | c. | a company LAN | b. | a company extranet | d. | any of these |
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9.
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A type of wired communications technology used to
connect equipment in a home network is the following: ________.
a. | Ethernet | c. | HomePlug | b. | HomePNA | d. | any of these |
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10.
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A type of wired communications standard that may
require a router and a hub for a home network is ________.
a. | Ethernet | c. | HomePlug | b. | HomePNA | d. | none of these |
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11.
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Transmitting a signal from a ground station to a
satellite is called ________.
a. | compression | c. | uplinking | b. | decompression | d. | downlinking |
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12.
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The highest level that a satellite can occupy in
space is known as ________.
a. | geostationary earth orbit | c. | medium-earth
orbit | b. | high-earth orbit | d. | low-earth orbit |
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13.
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What wire channel consists of an insulated copper
wire wrapped in a solid or braided shield placed in an external cover?
a. | teisted-pair | c. | straight wire | b. | coaxial | d. | fiber-optic |
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14.
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What wired communications media consists of dozens
or hundreds of thin strands of glass or plastic, which transmit pulsating beams of
light?
a. | twisted-pair | c. | fiber-optic | b. | coaxial | d. | straight wire |
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15.
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What form of wireless transmission is limited to
line-of-sight communications?
a. | broadcast radio | c. | microwave | b. | infrared | d. | fiber-optic |
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16.
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What form of wireless transmission sends data to an
AM or FM receiver?
a. | broadcast radio | c. | fiber-optic | b. | infrared | d. | coaxial |
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17.
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The ________ is a device that is designed primarily
for communications by voice through a system of ground-area cells.
a. | digital wireless phone | c. | modem | b. | analog cellular phone | d. | pager |
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18.
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What short-distance wireless standard is used to
link cell phones, PDAs, and computers at distances of up to 30 feet?
a. | Bluetooth | c. | HomeRF | b. | Wi-Fi | d. | coaxial |
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19.
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What short-distance wireless standard is used to
link machines so they may communicate at high speeds from a distance of up to 228
feet?
a. | Bluetooth | c. | Wi-Fi | b. | HomeRF | d. | coaxial |
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20.
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What one-way communications device is a simple
radio receiver that receives data sent from a special radio transmitter?
a. | modem | c. | pager | b. | digital phone | d. | analog phone |
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21.
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Broadband technology is also referred to as
________ generation wireless services.
a. | first | c. | third | b. | second | d. | fourth |
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22.
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Which of the following is NOT a type of wireless
communications media?
a. | infrared transmission | c. | virtual office | b. | broadcast radio | d. | microwave radio |
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23.
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Which of the following is NOT a type of
long-distance wireless two-way communications device?
a. | Bluetooth | c. | analog cellular phone | b. | two-way
pager | d. | 2G digital
cellphone |
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24.
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Which of the following does NOT utilize broadcast
radio frequencies?
a. | AM/FM radio | c. | CB radio | b. | microwave radio | d. | police radio |
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25.
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A set of conventions that govern how data is
exchanged between devices on a network is known as ________.
a. | sanction | c. | protocol | b. | constitotion | d. | rules |
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26.
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A ________ is a system of interconnected computers,
telephones, or communications devices that can communicate and share resources.
a. | terminal | c. | network | b. | router | d. | server |
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27.
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A network that covers a wide geographical area is
called a ________.
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28.
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A network that covers a city or a suburb is called
a ________.
a. | WAN | c. | MAN | b. | LAN | d. | internet |
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29.
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A ________ uses wired, cable, or wireless
connections to link a household's digital devices.
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30.
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A mainframe computer that controls a large network
is called the ________ computer.
a. | slave | c. | client | b. | host | d. | node |
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31.
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Any device that is attached to a network is
referred to as a ________.
a. | server | c. | node | b. | host | d. | router |
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32.
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In an organization, all computer networks are
connected to the internet by a ________.
a. | skeleton | c. | brain stem | b. | backboan | d. | router |
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33.
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A computer that acts like a disk drive, storing the
programs and data files shared by users on a LAN, is the ________ server.
a. | file | c. | database | b. | web | d. | mail |
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34.
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A network that operates without relying on a server
is the ________ network.
a. | peer-to-peer | c. | host-to-host | b. | client/server | d. | master/slave |
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35.
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A special computer that directs communicating
messages when several networks are connected together is a ________.
a. | node | c. | bridge | b. | router | d. | firewall |
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36.
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An interface used to connect the same types of
networks is called a ________.
a. | node | c. | firewall | b. | gateway | d. | bridge |
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37.
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Dissimilar networks communicate via an interface
called a ________.
a. | node | c. | firewall | b. | gateway | d. | bus |
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38.
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What kind of network topology is used by a network
that connects all its computers and communications devices to a central server?
a. | ring | c. | star | b. | bus | d. | peer-to-peer |
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39.
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What kind of network topology is used by a network
that connects all computers and communications devices in a continuous loop?
a. | ring | c. | star | b. | bus | d. | peer-to-peer |
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40.
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In the ________ network topology, communications
devices are connected to a common channel.
a. | ring | c. | star | b. | bus | d. | peer-to-peer |
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41.
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If an organization's internal private network
uses the same infrastructure and standards of the internet, then the private network would be called
the ________.
a. | extranet | c. | LAN | b. | intranet | d. | MAN |
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42.
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If an intranet allows selected outside users to
have access, it is a(n) ________.
a. | firewall | c. | gateway | b. | extranet | d. | router |
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43.
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A common connection point for devices on a network
is called a ________.
a. | router | c. | hub | b. | gateway | d. | bridge |
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44.
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Which of the following is NOT a network
topology?
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45.
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Which of the following is NOT used as a short-range
wireless standard for home automation networks?
a. | Insteon | c. | ZigBee | b. | Ethernet | d. | Z-Wave |
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46.
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The infamous Love Bug that did damage worth $10
billion is an example of a(n) ________.
a. | a Trojan horse | c. | a virus | b. | a software bug | d. | a logic bomb |
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47.
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A ________ is a program that copies itself
repeatedly into a computer's memory or onto a disk drive.
a. | worm | c. | Trojan horse | b. | virus | d. | patch |
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48.
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Which of the following viruses attaches itself to
executable files?
a. | Boot sector virus | c. | File virus | b. | Multipartite virus | d. | Logic bomb |
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49.
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Which of the following viruses are set to go off at
a certain date and time?
a. | Boot sector virus | c. | File virus | b. | Multipartite virus | d. | Logic bomb |
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50.
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A polymorphic virus is a type of
________.
a. | Boot sector virus | c. | File virus | b. | Multipartite virus | d. | Logic bomb |
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51.
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Which of the following is NOT a way to spread a
virus?
a. | An infected floppy disk or CD placed into a
computer. | c. | Via e-mail or an electronic bulletin
board. | b. | Scanning a picture. | d. | From downloaded
games or other software. |
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52.
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Antivirus software protects files and the computer
system in all of the following ways except which one:
a. | Scans the hard drive for signatures that uniquely
identify a virus. | c. | Goes out on the internet and looks for
viruses. | b. | Looks for suspicious virus-like
behavior. | d. | Destroys the virus. |
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53.
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What kind of software scans a computer's hard
disk, floppy disks, and main memory to detect viruses and, sometimes destroy
them?
a. | antivirus software | c. | fragmentation software | b. | antispam
software | d. | cleansing
software |
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54.
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A person who illegally breaks into computers for
malicious purposes is called a ________.
a. | cracker | c. | administrator | b. | hacker | d. | engineer |
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55.
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A person who gains unauthorized access to computer
or telecommunications systems without malicious intent is called a ________.
a. | cracker | c. | administrator | b. | hacker | d. | analyst |
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56.
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What is the science of measuring individual body
characteristics?
a. | Encryption | c. | Password protection | b. | Decryption | d. | Biometrics |
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57.
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What is the process of altering readable data into
unreadable form to prevent unauthorized access known as?
a. | Encryption | c. | Password protection | b. | Decryption | d. | Biometrics |
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58.
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Fingerprint scanners, face-recognition systems,
iris-recognition systems are based on ________.
a. | encryption | c. | password protection | b. | decryption | d. | biometrics |
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59.
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Which of the following is NOT an example of
public-key encryption?
a. | PGP (pretty Good Encryption) | c. | DES (Digital Encryption
Standard) | b. | RSA encryption | d. | Fortezza |
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60.
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RSA encryption is an example of ________
technology.
a. | public key encryption | c. | password protection | b. | private key encryption | d. | biometric |
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61.
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____________ encryption uses two keys, one held by
the sender and one held by the receiver, to decrypt a message
a. | Public key | c. | differential coding | b. | digital technology | d. | scalable coding |
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