Chapter 6: Business Networks and telecommunications

24. FTTH is point-to-point transmission between two stationary devices, usually between two buildings, as opposed to mobile wireless, in which people carry a mobile device. T/F

False

25. Telecommunication companies offering fixed wireless service require franchise licenses. T.F

False

4. Fiber optic technology uses electricity to represent bits. T/F

False

6. Coaxial cable connects to network devices with RJ-45 plug-in connectors. T/F

False

7. Optical fibers can carry signals over relatively shorter distances compared to other media. T/F

False

36. span a greater distance than LANs and usually have more complicated networking equipment for midrange communications. a. WANs (wide area networks) b. MANs (metropolitan area networks) c. peer-to-peer LANs d. PANs (personal area networks)

MANs (metropolitan area networks)

64. One of the most interesting developments in worldwide telecommunications is ---- through the Internet: anyone with access to the Internet can download one of several free applications that help locate and download files from any online computer.

P2P file sharing

66. The ----of a medium is the speed at which data is communicated, which is also called the transmission rate or simply the bit rate.

bandwidth

31. The bandwidth of a communication medium is measured as . a. data per second b. rates per second c. codes per second d. bits per second

bits per second

39. A is a device that connects two networks, such as a LAN, to the Internet. a. switch b. bridge c. router d. modem

bridge

65. The term--- is associated with a high-speed networking connection, which is required for fast transmission of large files and multimedia material.

broadband

48. The proliferation of highspeed connection services, also called , is mainly the result of businesses' and individuals' rush to the Internet. a. baseband services b. static services c. broadband services d. bridge services

broadband services

77. A(n) ------with a modem is very slow (usually no faster than 56 Kbps), so most users and small businesses today are turning to faster connections that use digital signals throughout the connection, such as DSL and cable connections.

dial-up connection

49. With , data transmitted to computers from a telephone company's switching center remains digital throughout the entire transmission. a. digital subscriber line b. dial-up connections c. normal landline telephone service d. cable modems

digital subscriber line

26. The Greek word tele, which means " ," is part of such words as "telephone," "teleconference," and other words referring to technologies that allow communications over large distances. a. far b. path c. away d. distance

distance

74. The speed of receiving from a network is called ---- .

downstream

63. A temporary IP address assigned to a computer connected to the Internet intermittently for the duration of its connection only is called .------

dynamic IP address

42. The ability to scramble and code messages through keys that are shared only between the sender and receiver is referred to as _____. a. encryption b. decryption c. transcription d. transmission

encryption

52. An alternative for households that cannot obtain cable or DSL connections to the Internet is . a. optical carriers b. T1 lines c. T3 lines d. fixed wireless

fixed wireless

58. The speeds of transmitting into a network are referred to as speeds. a. nodal b. download c. upstream d. downstream

upstream

29. Businesses use to save on travel costs and lodging, car fleets, and the time of highly salaried employees incurred on bringing together employees working in different organizations or at different sites in the same organization. a. videoconferencing b. access points c. hotspots d. graphic communications

video conferencing

78. The "virtual" in refers to the illusion that the user is accessing a private network directly, rather than through a public network

virtual private network (VPN)

72. A(n) ----- is a system of networks composed of multiple LANs or MANs that are connected across a distance of more than approximately 48 kilometers.

wide area network (WAN)

60. A communications ---- is a set of rules that govern communication between computers or between computers and other computer-related devices that exchange data.

protocol

40. A can connect dissimilar networks and can be programmed to also act as a firewall to filter communications. a. switch b. router c. repeater d. modem

router

n office LANs, one computer is often used as a central repository of programs and files that all connected computers can use; this computer is called a(n) .-------

server

62. Permanent IP addresses assigned to servers and many other computers and devices are called------- .

static IP address

38. A is a common device often used as a central location to connect computers or devices to a local network. a. repeater b. bridge c. router d. switch

switch

59. ------, which is essential to smooth operations in today's business world, is the transmittal of data and information from one point to another.

telecommunications

28. The major advantage of mobile phone is that . a. they use Internet-based phone services b. they are attached to people c. they create a virtual private network d. they are attached to offices

they are attached to people

27. When a call is placed on a cellular phone, the signal is first transmitted to the closest , which sends a signal through landlines that dial the desired phone number. a. modem b. hotspot c. transceiver d. router

transceiver

22. With digital subscriber line (DSL), the data is transformed into analog signals. T/F

False

23. The bit rates of DSL lines usually have no relation to the distance of the subscriber's computer from the regional central office of the telephone company. T/F

False

44. The standard was developed for devices that communicate with each other within a short range of up to 10 meters (33 feet) in the office, at home, and in motor vehicles. a. Wi-Fi b. Bluetooth c. WiMAX d. MBWA

Bluetooth

1. Telecommunications has made business processes less efficient. T/F

False

12. The simplest WAN is a satellite linkup between LANs in two different countries. T/F

False

15. IEEE 802.15 is a family of wireless protocols, collectively known as Wi-Fi. T/F

False

19. WiMAX is a wide area network (WAN) technology. T/F

False

67. ----- is sometimes called TV cable or simply "cable" because of its common use for cable television transmission.

Coaxial cable

21. Organizations avoid telecommunications because these increase costs and office space. T/F

False

82. IEEE 802.3, known as----- , is the only LAN protocol of significance.

Ethernet

allow Internet access to anyone within range who uses a wireless-equipped device, provided logging in is not limited by controlled access codes. a. Hotspots b. VANs c. Intranets d. VPNs

Hotspots

61. Every device on the Internet is uniquely identified with a numerical label known as------ .

Internet protocol (IP) address

35. A computer network within a building, or a campus of adjacent buildings, is called a . a. MAN (metropolitan area network) b. WAN (wide area network) c. LAN (local area network) d. PAN (personal area network)

LAN (local area network)

45. is a standard method of wireless communications, specifically for high-speed data transmission for mobile phones. a. Near-field communication b. Long-Term Evolution c. Bluetooth d. WiMAX

Long-Term Evolution

30. is a standard communication protocol to create a radio connection between two devices. a. Long-term evolution b. Voice over Internet protocol c. Near-field communication d. Metropolitan area communication

Near-field communication

53. The number next to refers to data speed in multiples of 51.84 Mbps, considered the base rate bandwidth of a very high connection speed service. a. DSL b. OC c. Wi-Fi d. BPL

OC

68. Light is not susceptible to EMI (electromagnetic interference) and----- , which is why fiber optic communication is much less prone to error than twisted pair and radio transmission.

RFI (radio frequency interference)

can be very tiny, about the size of a rice grain, or several square inches, depending on the amount of information they need to contain and the environment in which they are used. a. Infrared Data Association cards b. Radio Frequency Identification tags c. Bluetooth ports d. Micro tags

Radio Frequency Identification tags

51. A line is made of 24 channels (groups of wires) of 64 Kbps each. a. T1 b. T2 c. T3 d. T4

T1

46. are point-to-point dedicated digital circuits provided by telephone companies. a. T1 and T3 lines b. Nodes c. Optical carriers d. Microwaves

T1 and T3 lines

41. The most important and pervasive set of protocols for telecommunications and networks today is called . a. NFC b. WPA c. TCP/IP d. CDMA

TCP/IP

81. Communication on the Internet primarily follows the network protocol -----, , which is actually a set of related protocols.

TCP/IP (Transmission Control Protocol/ Internet Protocol)

50. Which of the following statements is true about radio frequency identification tags? a. They need enormous power. b. They are not always flat. c. They do not have a memory to store data. d. They should be several square inches in size.

They are not always flat.

10. A peer-to-peer LAN is one in which no central device controls communications. T/F

True

11. A repeater amplifies or regenerates signals so that they do not become weak or distorted. T/F

True

13. A computer connected directly to the Internet backbone—the highest speed communication channels—is called a host. T/F

True

14. The process of associating a character-based name such as course.com with an IP address is called domain name resolution, and the domain name resolution service is DNS (Domain Name System). T/F

True

16. A direct link to a wireless router or access point creates a hotspot. T/F

True

17. The Wi-Fi Protected Access (WPA) and WPA2 security protocols offer encryption. T F

True

18. IEEE 802.16, Worldwide Interoperability for Microwave Access (WiMAX), increases the range and speed of wireless communication. T/F

True

2. The use of e-mail, instant messaging, and voice mail has brought some secondary benefits to business communications by establishing a permanent written or electronic record of, and accountability for, ideas. T/F

True

20. Each generation of mobile communication technologies refers to a communication protocol or a combination of protocols. T/F

True

3. Radio frequency identification (RFID) technology enables us to conduct transactions and to make payments quickly. T/F

True

5. When a line is capable of carrying multiple transmissions simultaneously, it is said to be broadband. T/F

True

8. The important factors in choosing a networking medium are availability, current and potential bandwidth, and vulnerability to electromagnetic interference (EMI) or radio frequency interference (RFI). T/F

True

9. There are three basic types of networks: LANs, MANs, and WANs.T/F

True

32. is a popular medium for connecting computers and networking devices because it is relatively flexible, reliable, and low cost. a. Coaxial cable b. Twisted pair cable c. Twinaxial cable d. Optical fiber

Twisted pair cable

37. fulfill organizational needs for reliable data communications while relieving the organization of the burden of providing its own network management and maintenance. a. Leased lines b. VANs c. Dial-up connections d. LANs

VANs

54. A can be thought of as a "tunnel" through the Internet or other public network that allows only authorized users to access company resources. a. peer-to-peer LAN b. VPN c. WLAN d. WAN

VPN

73. Large -----might have many constituent LANs and MANs on different continents.

WANS

55. is a standard for software that digitizes and compresses voice signals and transmits the bits via the Internet link. a. VoIP b. SoIP c. IRC d. TCP/IP

a. VoIP

79. A single Wi-Fi router can be connected to a(n) , which in turn is connected to a wired network and usually to the Internet.

access point (AP)

47. The first generation of mobile communication technologies used . a. circuit switching b. packet switching c. digital voice encoding d. GSM and CDMA protocols

circuit switching

80. WiMAX is a(n) technology.

metropolitan area network (MAN)

33. are high-frequency radio waves that can carry signals over long distances with high accuracy. a. Microwaves b. Shortwaves c. Mediumwaves d. Kilometer waves

microwaves

69. In the context of data communications, a(n)---- is a combination of devices or nodes connected to each other through a communication medium.

network

76. Each computer or device connected to a network must have a(n ----) or proper networking circuitry, which connects through a cable or a wireless antenna to a hub, switch, bridge, or router, which in turn connects to a LAN or WAN.

network interface card (NIC)

56. The major downside of internet service provided by television cable firms is that cable . a. nodes are shared by all the subscribers connected to the cable b. cannot provide Internet access c. networks are not as secured as other networking services d. provides services only to one subscriber at a time

nodes are shared by all the subscribers connected to the cable

70. A computer network within a building, or a campus of adjacent buildings, is called a(n) ---- , or LAN.

ocal area network

34. Bluetooth is considered a technology, because it typically supports a network used by only one person. a. metropolitan area network b. personal area network c. wide area network d. local area network

personal area network

75. A(n)----- is a wireless network designed for handheld and portable devices such as smartphones and tablet or laptop computers, and is intended for use by only one or two people.

personal area network (PAN)