Discovering Computers 2016: Chapter 10

Front 1

Which of the following best describes DSL connections?

• uses fiber-optic cable to provide extremely high-speed Internet access to a user’s physical, permanent location
  
• uses long-distance digital telephone lines to carry multiple signals over a single line; only medium to large companies can afford them
  
• transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user
  
• a service that carries voice, data, video, and multimedia at a high speed; used by telephone networks and the Internet
  

Back 1

Answer: transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user

Front 2

Which of the following has the fastest maximum transfer transmission rate?

• 802.11ad
  
• 802.11g
  
• 802.11ac
  
• UWB
  

Back 2

Answer: UWB

Front 3

On a network such as the one illustrated in the accompanying figure, some servers perform a specific task and can be placed w/ other servers to perform multiple tasks. What are these kind of servers called?

• dedicated
  
• unique
  
• multitasking
  
• baseband
  

Back 3

Answer: dedicated

Front 4

Which of the following kinds of modems is a modem that sends and receives digital data over and information to and from a digital line?

• broadband
  
• wireless
  
• baseband
  
• access
  

Back 4

Answer: broadband

Front 5

Which of the following is true of DSL?

• It uses a line that is shared with other users in the neighborhood.
  
• It has widespread availability.
  
• Users share DSL nodes with up to hundreds of other users.
  
• It is a popular digital line alternative for the small business or home user.
  

Back 5

Answer: It is a popular digital line alternative for the small business or home user.

Front 6

Which of the following is a transmission media on which data, instructions, or information travel?

• communications path
  
• communications channel
  
• communications flow
  
• communications route
  

Back 6

Answer: communications channel

Front 7

Your school computer library has a network that connects computers and devices within a few small rooms. What type of network does it likely use?

• MAN
  
• LAN
  
• VAN
  
• WAN
  

Back 7

Answer: LAN (local area network)

Front 8

Which of the following technologies is your new mobile phone payment device most likely to use?

• NFC
  
• Bluetooth
  
• Token ring
  
• WiMax
  

Back 8

Answer: NFC

Front 9

Which of the following terms is the time it takes a signal to travel from one location to another on a network?

• frequency
  
• symmetry
  
• latency
  
• delay register
  

Back 9

Answer: latency

Front 10

Which network type connects each computer and device to a central device?

• a bus network
  
• a ring network
  
• a core network
  
• a star network
  

Back 10

Answer: a star network

Front 11

Which of the following is a central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network?

• wireless link
  
• router
  
• integral point
  
• wireless access point
  

Back 11

Answer: wireless access point

Front 12

You are purchasing a new mobile phone, and are learning about categories of cellular transmissions. You ask the sales person what the ‘G’ stands for in the categories 1G, 2G, 3G, and 4G. What does he reply?

• gigabytes
  
• generation
  
• global
  
• geographic
  

Back 12

Answer: generation

Front 13

Network servers and web servers are examples of what type of server?

• client servers
  
• resource servers
  
• dedicated servers
  
• device servers
  

Back 13

Answer: dedicated servers

Front 14

Which of the following statements best describes the Ethernet network standard?

• no central computer or device on the network should control when data can be transmitted
  
• computers and devices on the network share or pass a special signal in a unidirectional manner and in a preset order
  
• describes rules for dividing messages into small pieces, called packets
  
• computers on a network cannot communicate unless they share the same form of translation
  

Back 14

Answer: no central computer or device on the network should control when data can be transmitted

Front 15

As shown in the accompanying figure, what is the term for a network that covers a large geographic area, such as a city, country, or the world, using a variety of wired and wireless transmission media?

• variable area network (VAN)
  
• wide area network (WAN)
  
• metropolitan area network (MAN)
  
• local area network (LAN)
  

Back 15

Answer: wide area network (WAN)

Front 16

You run a large network in which it is important to keep a duplicate of the central devices in case the primary one fails. What category of network topology does this network use?

• star network
  
• core network
  
• ring network
  
• bus network
  

Back 16

Answer: star network

Front 17

Which of the following is the maximum transfer transmission rate for communications satellites?

• 2.56 Mbps
  
• 2.56 Gbps
  
• 25 Gbps
  
• 2.56 Tbps
  

Back 17

Answer: 2.56 Tbps

Front 18

Which of the following did Sven Mattisson and Jaap Haartsen invent?

• WiMAX
  
• Ethernet
  
• Bluetooth
  

• IrDA
  

Back 18

Answer: Bluetooth

Front 19

What term is used to describe the time it takes a signal to travel from one location to another on a network?

• bandwidth
  
• transmission performance
  
• access time
  
• latency
  

Back 19

Answer: latency

Front 20

What term describes the process in which two or more computers or devices transfer data, instructions, and information?

• digital cybering
• digital channeling
• digital connecting
• digital communication
  

Back 20

Answer: digital communication

Front 21

Which of the following is a LAN that uses no physical wires?

• PLAN
  
• WLAN
  
• TLAN
  
• BLAN
  

Back 21

Answer: WLAN (wireless local area network)

Front 22

Which statement best describes how the RFID standard works?

Two connected network devices use infrared light to create a direct frequency.

• The network uses radio signals to communicate with a tag placed in or attached to an object, animal, or person.
  
• A node on a network must have an individual ID code that can communicate with other ready devices.
  
• The network uses reference devices instead of actual devices to speed up the transmission process.
  

Back 22

Answer: The network uses radio signals to communicate with a tag placed in or attached to an object, animal, or person.

Front 23

What is a sending device?

• a device that accepts the transmission of data, instructions, or information
  
• a device that initiates an instruction to transmit data, instructions, or information
  
• a device that connects to a communications channel
  
• a device on which data, instructions, and information travel
  

Back 23

Answer: a device that initiates an instruction to transmit data, instructions, or information

Front 24

Which of the following is a 4G standard?

• UMTS
  
• LTE
  
• EVDO
  
• CDMA
  

Back 24

Answer: LTE

Front 25

Which of the following has the fastest transfer rate?

• Fractional T1
  
• ATM
  
• T3
  
• FTTP
  

Back 25

Answer: ATM

Front 26

Which of the following statements best describes the Ethernet network standard?

• computers and devices on the network share or pass a special signal in a unidirectional manner and in a preset order
  
• no central computer or device on the network should control when data can be transmitted
  
• computers on a network cannot communicate unless they share the same form of translation
  
• describes rules for dividing messages into small pieces, called packets
  

Back 26

Answer: no central computer or device on the network should control when data can be transmitted.

Front 27

Which of the following is a simple, inexpensive network that typically connects fewer than 10 computers?

• hard network
  
• interpolated network
  
• MAN
  
• peer-to-peer network
  

Back 27

Answer: peer-to-peer network

Front 28

Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?

• microwave station
  
• planetary dish
  
• domestic carrier
  
• interstellar transport
  

Back 28

Answer: microwave station

Front 29

Which of the following kinds of devices is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device?

• linkage
  
• baseband
  
• communications
  
• dial-up
  

Back 29

Answer: communications devices

Front 30

Which of the following terms identifies any network based on the 802.11 family of standards?

• IEEE
  
• Wi-Fi
  
• FireWire
  
• mesh
  

Back 30

Answer: IEEE

Front 31

Which of the following is true of the installation of a network like the one shown in the accompanying figure?

• It must span a smaller distance than a WLAN network, but it is easier.
  
• It can span a larger distance than a P2P network, and it is easier.
  
• It must have built-in wireless capability or the appropriate wireless network card, USB adapter, or other wireless device
  
• It is an internal network that uses Internet technologies
  

Back 31

Answer: It must have built-in wireless capability or the appropriate wireless network card, USB adapter, or other wireless device

Front 32

What is the approximate distance most Bluetooth devices can be from each other to communicate, without using additional equipment?

• 8 feet
  
• 33 feet
  
• 80 feet
  
• 100 feet
  

Back 32

Answer: 33 feet

Front 33

How many wired and/or wireless computers and mobile devices might a router be able to connect?

• more than 200
  
• more than 450
  
• more than 500
  
• There is no limit.
  

Back 33

Answer: more than 200

Front 34

Which is the best description of a coaxial cable?

• dozens or hundreds of thin strands of glass or plastic that use light to transmit signals
  
• a cohesive cable connected at axis points
  
• one or more pairs of copper wires bundled together
  
• a single copper wire surrounded by at least three layers
  

Back 34

Answer: a single copper wire surrounded by at least three layers

Front 35

Which of the following technologies is your new remote control most likely to use?

• IrDA
  
• Bluetooth
  
• RFID
  
• TCP/IP
  

Back 35

Answer: IrDA

Front 36

Which of the following can detect problems—such as why traffic is flowing slowly—on networks that use the TCP/IP protocol?

• packet sniffer software
• bit monitoring scripts
• torrent flow apps
• Ethernet analyzers
  

Back 36

Answer: packet sniffer software

Front 37

Which of the following best describes DSL connections?

• uses long-distance digital telephone lines to carry multiple signals over a single line; only medium to large companies can afford themb.
• a service that carries voice, data, video, and multimedia at a high speed; used by telephone networks and the Internetc.
• transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user
• uses fiber-optic cable to provide extremely high-speed Internet access to a user’s physical, permanent location
  

Back 37

Answer: transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user

Front 38

Which of the following is the least likely technology PANs would use?

• special USB cables
• Wi-Fi
• peer-to-peer
• Bluetooth
  

Back 38

Answer: peer-to-peer

Front 39

Which of the following has a port to which a cable connects in order to coordinate the transmission and receipt of data, instructions, and information to and from the computer or device containing it?

• network interface card
• router
• connector
• transmitter
  

Back 39

Answer: network interface card

Front 40

Which of the following has the fastest transfer rate?

• ISDN
• DSL
• FTTP
• Cable
  

Back 40

Answer: FTTP

Front 41

Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.

• networks
• instructions
• data
• information
  

Back 41

Answer: networks

Front 42

Which of the following is true of DSL?

• It uses a line that is shared with other users in the neighborhood.
• It is a popular digital line alternative for the small business or home user.
• Users share DSL nodes with up to hundreds of other users.
• It has widespread availability.
  

Back 42

Answer: It is a popular digital line alternative for the small business or home user.

Front 43

Who invented the Ethernet?

• Robert Metcalfe
• Bill Gates
• Larry Ellisond
• Steve Jobs
  

Back 43

Answer: Robert Metcalfe

Front 44

Which of the following offers an alternative to infrared communications with high bandwidth transmissions?

• Wi-Fi
• Bluetooth
• cellular radio
• IrDA
  

Back 44

Answer: Bluetooth

Front 45

Which of the following statements is not true of Wi-Fi?

• Wi-Fi sometimes is referred to as wireless Ethernet.
• Even if two products are Wi-Fi Certified, they must share the same platform in order to communicate.
• In open or outdoor areas free from interference, computers or devices should be within 300 feet of each other to be able to communicate.
• When a Wi-Fi network accesses the Internet, it works in conjunction with the TCP/IP network standard.
  

Back 45

Answer: Even if two products are Wi-Fi Certified, they must share the same platform in order to communicate.

Front 46

Contactless payment uses this technology.

Back 46

Answer: NFC

Front 47

Transmission media that uses wire, cable, and other tangible materials to send communications signals.

Back 47

Answer: Physical

Front 48

Standard that specifies how wireless devices communicate over the air in a wide area.

Back 48

Answer: WiMAX

Front 49

Kind of network that is sometimes called a file sharing network.

Back 49

Answer: P2P

Front 50

Transmission media that sends communications signals through the air or space using radio, microwave, and infrared signals.

Back 50

Answer: Wireless

Front 51

Consists of a single copper wire surrounded by at least three layers.

Back 51

Answer: Coaxial

Front 52

A network standard that specifies how two devices use short-range radio waves to communicate at high speeds with each other.

Back 52

Answer: UWB

Front 53

Kind of cable designed to reduce noise.

Back 53

Answer: twisted pair

Front 54

This kind of device contains a small chip that allows it to communicate with other similar devices.

Back 54

Answer: Bluetooth

Front 55

Mobile computers and devices, such as a mouse, printer, and smartphone, often have this kind of port to enable the transfer of data from one device to another using light waves.

Back 55

Answer: infrared

Front 56

A wireless transmission medium that distributes radio signals through the air over long distances.

Back 56

Answer: broadcast radio

Front 57

Type of lines that can be either analog or digital.

Back 57

Answer: dedicated lines

Front 58

Protocol that defines how a network uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person.

Back 58

Answer: RFID

Front 59

A form of broadcast radio that is used widely for mobile communications.

Back 59

Answer: cellular radio

Front 60

To prevent unauthorized users from accessing files and computers, many routers are protected by these.

Back 60

Answer: firewall

Front 61

Category of cellular transmission that transmits digital data at speeds from 9.6 Kbps to 144 Kbps.

Back 61

Answer: 2G

Front 62

Examples of standards in this category include EDGE and UMTS.

Back 62

Answer: 3G

Front 63

Can be negatively affected by the distance between two points, the type of transmission media, and the number of nodes through which data must travel.

Back 63

Answer: latency

Front 64

The core of this kind of cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals.

Back 64

Answer: fiber optic

Front 65

Category of cellular transmission that transmits digital data at speeds up to 100 Mbps.

Back 65

Answer: 4G