Deck 6: Business Networks and Telecommunications

Question 1

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).

Answer 1

True

Question 2

Optical fibers can carry signals over relatively shorter distances compared to other media.

Answer 2

False

Question 3

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

Answer 3

True

Question 4

A peer-to-peer LAN is one in which no central device controls communications.

Question 5

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

Question 6

WiMAX is a wide area network (WAN) technology.

Question 7

Fiber optic technology uses electricity to represent bits.

Question 8

There are three basic types of networks: LANs,MANs,and WANs.

Question 9

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

Question 10

Each generation of mobile communication technologies refers to a communication protocol or a combination of protocols.

Question 11

A repeater amplifies or regenerates signals so that they do not become weak or distorted.

Question 12

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

Question 13

A computer connected directly to the Internet backbone-the highest speed communication channels-is called a host.

Question 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).

Question 15

Coaxial cable connects to network devices with RJ-45 plug-in connectors.

Question 16

Telecommunications has made business processes less efficient.

Question 17

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.

Question 18

The simplest WAN is a satellite linkup between LANs in two different countries.

Question 19

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

Question 20

A direct link to a wireless router or access point creates a hotspot.

Question 21

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

Question 22

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

Question 23

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

Question 24

_________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)

Question 25

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.

Question 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

Question 27

Organizations avoid telecommunications because these increase costs and office space.

Question 28

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

Question 29

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

Question 30

_________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

Question 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

Question 32

A_________ is a device that connects two networks,such as a LAN,to the Internet.

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

Question 33

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

Question 34

_________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

Question 35

Telecommunication companies offering fixed wireless service require franchise licenses.

Question 36

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)

Question 37

_________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

Question 38

_________are high-frequency radio waves that can carry signals over long distances with high accuracy.

A)Microwaves
B)Shortwaves
C)Mediumwaves
D)Kilometer waves

Question 39

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

Question 40

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.

Question 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

Question 42

_________are point-to-point dedicated digital circuits provided by telephone companies.

A)T1 and T3 lines
B)Nodes
C)Optical carriers
D)Microwaves

Question 43

The first generation of mobile communication technologies used_________ .

A)circuit switching
B)packet switching
C)digital voice encoding
D) GSM and CDMA protocols

Question 44

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

Question 45

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

Question 46

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

Question 47

A_________ line is made of 24 channels (groups of wires) of 64 Kbps each.

A)T1
B)T2
C)T3
D)T4

Question 48

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

Question 49

The speeds of transmitting into a network are referred to as _________speeds.

A)nodal
B)download
C)upstream
D)downstream

Question 50

_________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

Question 51

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

Question 52

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

Question 53

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

Question 54

_________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

Question 55

_________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

Question 56

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

Question 57

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

Question 58

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.

Question 59

_________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

Question 60

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

Question 61

In 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) _________.

Question 62

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.

Question 63

Permanent IP addresses assigned to servers and many other computers and devices are called_________ .

Question 64

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

Question 65

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

Question 66

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.

Question 67

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

Question 68

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.

Question 69

Large _________might have many constituent LANs and MANs on different continents.

Question 70

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

Question 71

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.

Question 72

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.

Question 73

WiMAX is a(n)_________ technology.

Question 74

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

Question 75

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

Question 76

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

Question 77

Every device on the Internet is uniquely identified with a numerical label known as_________ .

Question 78

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.

Question 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.

Question 80

The speed of receiving from a network is called_________ .