Deck 6: Business Networks and Telecommunications

Question 1

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

Answer 1

True

Question 2

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

Answer 2

True

Question 3

The major advantage of landline phones is that they are attached to people,not offices.

Answer 3

False

Question 4

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

Question 5

Internet relay is a high-speed packet-switching protocol used in WANs.

Question 6

There are two basic types of networks: LANs and MANs.

Question 7

A switch is like a modem,except that it is less "intelligent."

Question 8

GEO satellites are placed in orbit 35,784 kilometers (about 22,282 miles)above earth.

Question 9

You will find a WLAN in almost every warehouse.

Question 10

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

Question 11

Coaxial cable connects to network devices with RJ-45 plug-in connectors,which resemble the RJ-11 connectors used on telephone wire,but are slightly larger.

Question 12

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

Question 13

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

Question 14

Optical fiber technology is used in warehouses where employees can use handheld units to check a central system for availability and location of items to be picked up from and stored in shelves or bins.

Question 15

Networking professionals often refer to generations of mobile communication technologies.

Question 16

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 17

IEEE 702.Fi is a family of wireless protocols,collectively known as Wi-Fi.

Question 18

The use of e-mail,IM,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 19

Worldwide Interoperability for Microwave Access (WiMAX)functions similarly to cell phone communications,because it controls communication from stationary towers.

Question 20

A direct link to a wireless router or AP creates a hotspot.

Question 21

Usually,utility companies partner with telecommunications companies to provide Broadband over Power Lines (BPL).

Question 22

____ connect computers,printers,and other computer equipment for an office,several adjacent offices,an entire building or a campus.

A) MANs (metropolitan area networks)
B) WANs (wide area networks)
C) LANs (local area networks)
D) PANs (personal area networks)

Question 23

____ fulfill organizational needs for reliable data communications while relieving the organization of the burden of providing its own network management and maintenance.

A) WLANs
B) VANs
C) MANs
D) WANs

Question 24

LAN ____ have become a common device in offices and households.

A) modems
B) cards
C) adapters
D) routers

Question 25

Dial-up connections through regular phone lines and Ethernet computer network connections are examples of ____.

A) wideband
B) broadband
C) shortband
D) baseband

Question 26

The two major types of ____ are geostationary,also called GEO,and low earth orbit,also called LEO.

A) microwaves
B) satellites
C) broadband
D) baseband

Question 27

If you use a cable company to link to the Internet,the device connecting your computer's network card to the cable is called a ____.

A) dial-up modem
B) cable modem
C) DSL modem
D) BPL modem

Question 28

DSL Internet links are provided by television cable firms.

Question 29

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 30

When a communications medium can carry only one transmission at a time,it is known as ____.

A) broadband
B) longwave
C) baseband
D) shortwave

Question 31

____ 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 32

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 33

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) transistor
B) cell band
C) transceiver
D) cell transistor

Question 34

To provide DSL service,the telecommunications company connects your telephone line to a DSL bridge (often called a DSL modem).

Question 35

Businesses use ____ to save on travel costs and lodging,car fleets,and the time of highly salaried employees,whether they work in different organizations or at different sites of the same organization.

A) videoconferencing
B) videocommuting
C) graphicsconferencing
D) graphic communications

Question 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)

Question 37

A ____ is a group of bits transmitted together.

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

Question 38

With cellular phone networks,if the receiving phone is also mobile,the call is communicated to the ____ closest to the destination phone.

A) transistor
B) transceiver
C) cell transistor
D) cell band

Question 39

MBWA 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 40

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

A) Microwaves
B) Shortwaves
C) Ultraviolet
D) Infrared

Question 41

An alternative for households and small businesses that cannot obtain cable or DSL connections to the Internet is ____.

A) twisted pair lines
B) T1 lines
C) T3 lines
D) fixed wireless

Question 42

The most important and pervasive set of protocols for telecommunications and networks today is called ____.

A) SDLC
B) FTP
C) TCP/IP
D) NNTP

Question 43

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

A) generation
B) packet
C) wave
D) network

Question 44

The proliferation of high-speed connection services,also called ____,is mainly the result of businesses' and individuals' rush to the Internet.

A) baseband services
B) Download services
C) broadband services
D) Upstream services

Question 45

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

Question 46

____ 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 47

Telephone,e-mail,the World Wide Web-none of these essential business services would be available without fast,reliable ____________________.

Question 48

____ is known as a contention-based protocol,because devices on the network "contend" with other devices on the network for transmission time.

A) Ethernet
B) Internet
C) Wi-Fi
D) IEEE 802.11

Question 49

A portable digital music and video player can use ____ to communicate with your PC or another device (possibly another music/video player)to download files.

A) T1
B) RFID
C) Wi-Fi
D) DSL

Question 50

The differences among generations in mobile communications are mainly in capabilities and ____.

A) transmission speed
B) flexibility
C) durability
D) stability

Question 51

The purpose of ____ is to provide mobile communication that is compatible with IP services.

A) IrDA
B) MBWA
C) Bluetooth
D) WiMAX

Question 52

Even if ____ service availability is to lag far behind cable and optical fiber in terms of subscribers and revenue,utility companies are likely to invest in the technology for their own use.

A) dial-up
B) BPL
C) T1
D) DSL

Question 53

____ 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) IrDA cards
B) RFID tags
C) Bluetooth ports
D) Micro tags

Question 54

The number next to a(n)____ service refers to data speed in multiples of 51.84 Mbps,considered the base rate bandwidth.

A) DS
B) OC
C) Wi-Fi
D) BPL

Question 55

With ____,data remains digital throughout the entire transmission.

A) digital subscriber line (DSL)
B) dial-up line
C) twisted pair line
D) analog line

Question 56

____ allows reception at a much faster rate than transmission,that is,it is faster downstream than upstream.

A) Digital subscriber line (DSL)
B) Asymmetric DSL (ADSL)
C) Symmetric DSL (SDSL)
D) RADSL (Rate Adaptive DSL)

Question 57

Some experts see the future of telephony in a convergence of the cell phone and ____.

A) VoIP phone
B) DSL phone
C) micro phone
D) satellite phone

Question 58

____ 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) Hotpoints
C) APs
D) VPNs

Question 59

Named after a Scandinavian king who unified many tribes,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 60

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

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

Question 61

People sitting in conference rooms thousands of miles apart are brought together by their transmitted images and speech in what is called ____________________.

Question 62

Because light is not susceptible to EMI (electromagnetic interference)and ____________________,fiber optic communication is much less prone to error than twisted pair and radio transmission.

Question 63

A(n)____________________ usually links multiple LANs within a large city or metropolitan region and typically spans a distance of up to 50 kilometers (about 30 miles).

Question 64

In ____________________,a dedicated channel (a circuit)is established for the duration of the transmission.

Question 65

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

Question 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.

Question 67

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 68

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

Question 69

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 70

VAN services cost much more than those offered by ____________________.

Question 71

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

Question 72

Cellular phones derive their name from the territories of service providers,which are divided into areas known as ____________________.

Question 73

Once an organization connects its information systems to a public ____________________,security becomes a challenge.

Question 74

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 75

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 76

A communications ____________________ is the physical means that transports the signal,such as a copper wire telephone line,a television cable,or radio waves.

Question 77

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

Question 78

In ____________________,a message is broken up into packets.

Question 79

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

Question 80

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