Deck 6: Communications, Networks, and Cyberthreats: the Wired and Wireless World

Question 1

A ________ is a fixed-length block of data for transmission.

A) node
B) protocol
C) packet
D) backbone

Answer 1

C

Question 2

Signals such as sound and temperature,which continuously vary in strength and quality,are said to be _________.

A) spontaneous
B) digital
C) sequential
D) analog

Answer 2

D

Question 3

A ________ is the set of rules that govern the exchange of data between hardware and / or software components in a communications network.

A) host
B) protocol
C) database
D) packet

Answer 3

B

Question 4

The ________ is a device that converts digital computer signals into analog signals so that they can be sent over a telephone line.

A) printer
B) scanner
C) modem
D) digitizer

Question 5

A ________ is a system of interconnected computers,telephones,or communications devices that can communicate and share resources.

A) terminal
B) router
C) network
D) server

Question 6

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
B) web
C) host
D) mail

Question 7

If an organization's internal private network uses the same infrastructure and standards of the Internet,then the private network is a(n)________.

A) extranet
B) intranet
C) LAN
D) MAN

Question 8

A network that operates without relying on a server is the ________ network.

A) peer-to-peer
B) client / server
C) host-to-host
D) master / slave

Question 9

Each zero and one signal represents a ________.

A) bit
B) byte
C) kilobyte
D) megabyte

Question 10

Communications signals represented in a binary format are said to be ________.

A) continuous
B) digital
C) sequential
D) analog

Question 11

Any device that is attached to a network is referred to as a ________.

A) server
B) host
C) node
D) router

Question 12

A common connection device that connects computers to a network and that sends messages (checks packets)between sender and receiver nodes is called a ________.

A) router
B) gateway
C) switch
D) bridge

Question 13

A network that covers a wide geographical area is called a ________.

A) LAN
B) WAN
C) MAN
D) HAN

Question 14

A network that covers a city or a suburb is called a ________.

A) WAN
B) LAN
C) MAN
D) Internet

Question 15

A person sending a document over a phone line by converting a computer's digital signals to analog signals uses a ________.

A) printer
B) scanner
C) digitizer
D) modem

Question 16

A virtual private network may include ________.

A) a company intranet
B) a company extranet
C) a company LAN
D) any of these

Question 17

Networks are structured in two principle ways: client / server and ________.

A) intranet
B) host computer
C) extranet
D) peer to peer

Question 18

A mainframe computer that controls a large network is called the ________ computer.

A) slave
B) host
C) client
D) node

Question 19

A(n)________ is a system of hardware and / or software that protects a computer or a network from intruders.

A) VPN
B) intranet
C) firewall
D) protocol

Question 20

Which of the following is NOT an analog device?

A) speedometer
B) tire-pressure gauge
C) thermometer
D) smartphone

Question 21

________ is the most common and most widely used LAN technology,with networked devices in close proximity; it can be used with almost any kind of computer.Most microcomputers come with a port for this type of network connection,which uses cable.

A) Fiber-optic
B) Internet
C) Token ring
D) Ethernet

Question 22

A device that joins multiple wired and / or wireless networks in a home office is a ________.

A) node
B) router
C) bridge
D) firewall

Question 23

The highest level that a satellite can occupy in space is known as ________.

A) geostationary earth orbit (GEO)
B) high-earth orbit (HEO)
C) medium-earth orbit (MEO)
D) low-earth orbit (LEO)

Question 24

Transmitting a signal from a ground station to a satellite is called ________.

A) broadcasting
B) high-frequency
C) uplinking
D) downlinking

Question 25

In an organization,all computer networks are connected to the Internet by a "main highway" called a ________.

A) skeleton
B) backbone
C) gateway
D) router

Question 26

The ________ is the basis for ALL telecommunications signals.

A) bandwidth
B) electromagnetic spectrum
C) radio-frequency spectrum
D) wireless application protocol

Question 27

A communications medium is a channel; there are three types of wired communications media.The one consisting of two strands of insulated copper wire,used by tradition telephone systems,is known as ________.

A) twisted-pair
B) coaxial
C) fiber-optic
D) straight wire

Question 28

A type of wired communications technology used to connect equipment in a home network is the following:

A) Ethernet
B) HomePNA
C) HomePlug
D) any of these

Question 29

Which of the following is NOT a type of wireless communications media?

A) infrared transmission
B) satellite
C) coaxial
D) microwave radio

Question 30

What kind of topology (layout)is used by a network that connects all computers and communications devices in a continuous loop?

A) ring
B) bus
C) star
D) peer-to-peer

Question 31

What form of wireless transmission sends data to an AM or FM receiver?

A) broadcast radio
B) infrared radio
C) GPS
D) microwave radio

Question 32

What set of rules is used to link nearly all mobile devices to a telecommunications carrier's wireless network and content providers?

A) LAN
B) WAN
C) WAP
D) HAN

Question 33

What wired communications medium consists of dozens or hundreds of thin strands of glass or plastic?

A) twisted-pair
B) coaxial
C) fiber-optic
D) straight wire

Question 34

In the ________ network topology,communications devices are connected to a single cable with two endpoints.

A) ring
B) bus
C) star
D) peer-to-peer

Question 35

Which of these is NOT a network topology?

A) ring
B) bus
C) hub
D) star

Question 36

What wired channel,commonly used for cable TV,consists of an insulated copper wire wrapped in a solid or braided shield placed in an external cover?

A) twisted-pair
B) coaxial
C) straight wire
D) fiber-optic

Question 37

Which of these types of wireless transmission is limited to line-of-sight communications?

A) broadcast radio
B) broadband
C) microwave
D) WAP

Question 38

The ________ is the range of frequencies that a transmission medium (channel)can carry in a particular period of time.

A) bandwidth
B) electromagnetic spectrum
C) radio-frequency spectrum
D) wireless application protocol

Question 39

To create larger networks,a bridge connects the same types of networks,and a ________ connects dissimilar networks.

A) router
B) gateway
C) hub
D) host

Question 40

What kind of topology (layout)is used by a network that connects all its computers and communications devices to a central server?

A) ring
B) bus
C) star
D) peer-to-peer

Question 41

Capturing music digitally means that one has an exact duplicate of the music.

Question 42

Which of the following is NOT a way to spread a virus?

A) flash drives
B) scanning a picture
C) e-mail attachment
D) downloaded games or other software

Question 43

What short-distance wireless standard is used to link cell phones,computers,and peripherals at distances of up to about 33 feet?

A) Bluetooth
B) Wi-Fi
C) HomeRF
D) WISP

Question 44

Signals such as sound and temperature,which continuously vary in strength and quality,are said to be digital.

Question 45

What short-distance wireless standard is used to link portable computers and handheld wireless devices so they may communicate at high speeds at distances of 100-228 feet?

A) Bluetooth
B) HomeRF
C) Wi-Fi
D) 3G

Question 46

A ________ attack disables a computer system or network by making so many requests of it that it overloads it and keeps other users from accessing it.

A) worm
B) virus
C) denial-of-service
D) Trojan horse

Question 47

GPS uses satellites orbiting at a(n)________ level; they transmit timed radio signals used to identify earth locations.

A) GEO
B) MEO
C) LEO
D) HEO

Question 48

A modem converts digital signals into analog signals so they can be sent over a telephone line.

Question 49

Which of these is NOT a type of malware?

A) worm
B) virus
C) Trojan horse
D) denial-of-service attack

Question 50

Telephones have always been digital devices.

Question 51

A ________ is a program that copies itself repeatedly into a computer's memory or onto a disk / flash drive.

A) worm
B) rootkit
C) Trojan horse
D) patch

Question 52

Antivirus software protects files and computer systems in all of these ways EXCEPT which one?

A) scans the hard drive for signatures that uniquely identify a virus
B) looks for suspicious viruslike behavior
C) goes out on the Internet and looks for viruses
D) destroys the virus

Question 53

What is the science,often used in computer security systems,of measuring individual body characteristics?

A) encryption
B) decryption
C) rootkit
D) biometrics

Question 54

What is the process of altering readable data (plain text)into unreadable form to prevent unauthorized access?

A) encryption
B) decryption
C) password
D) biometrics

Question 55

A thermometer and a speedometer are examples of analog devices.

Question 56

"Modem" is short for modulate / demodulate.

Question 57

Analog refers to communications signals represented in a binary format.

Question 58

A botmaster uses malware to hijack hundreds or thousands of computers and controls them remotely; the controlled computers are called ________.

A) robots
B) zombies
C) worms
D) logic bombs

Question 59

Broadband technology (wireless digital services)is also referred to as ________-generation wireless services.

A) first
B) second
C) third
D) fourth

Question 60

Which of the following is NOT a type of long-distance wireless two-way communications device?

A) Bluetooth
B) CDMA
C) 1G analog cellular phone
D) 2G digital cellphone

Question 61

In a network,communications protocols specify the type of electrical connections,the timing of message exchanges,and error-detection techniques.

Question 62

A network is a system of interconnected computers and communications devices that can communicate and share resources.

Question 63

A LAN is a type of network that covers a wide geographical area.

Question 64

A gateway is an interface device permitting communication between similar networks.

Question 65

Traditional landline telephone systems use twisted-pair wire as their communications medium.

Question 66

Ethernet is a long-distance wireless communications connection.

Question 67

Client / server networks and peer-to-peer networks are the same except that the first type of network uses a mainframe and the second type uses only microcomputers.

Question 68

All wired and wireless communications media use the electromagnetic spectrum of radiation.

Question 69

Peer-to-peer networks are less stable than client-server networks because in the former certain shared resources reside on each user's machine.

Question 70

The Internet is a WAN.

Question 71

An interface device used to connect the same types of networks is called a node.

Question 72

"File server" and "database server" are different names for the same type of server.

Question 73

If you have one computer,you need firewall hardware; if you have more than one (networked)computer,then a software firewall should be used.

Question 74

In a bus network,all computers and communications devices are connected in a continuous loop.

Question 75

Virtual private networks (VPNs)are private networks that use a public network (usually the Internet)instead of private,leased (expensive)lines to connect remote sites.

Question 76

One wired communications standard that allows users to send data over a home's existing electrical (AC)power lines is called HomePlug technology; it uses existing electrical lines.

Question 77

The computer that acts like a disk drive,storing the programs and data files shared by users on a LAN,is called a file server.

Question 78

The backbone is the main communications route in a bus network topology.

Question 79

A cable that is made up of dozens of thin strands of glass and transmits pulsating beams of light is called a coaxial cable.

Question 80

Routers join multiple wired and / or wireless networks commonly in offices and home offices.