Deck 6: Telecommunications and Networks

Question 1

In a circuit-switching network, no fixed path is created between the communicating devices, and the data is broken into packets for sending over the network.

Answer 1

False

Question 2

An advantage of a packet-switching network is that data arrives in exactly the same order in which it is sent.

Answer 2

False

Question 3

A telecommunications protocol is any material substance that carries an electronic signal to support communications between a sending and receiving device.

Answer 3

False

Question 4

A wide area network (WAN) is a telecommunications network that connects users and their computers in a geographical area that spans a campus or city.

Question 5

Channel bandwidth refers to the diameter of the telecommunications media.

Question 6

With synchronous communications, the receiver gets a message after some delay-a few seconds to minutes or hours or even days after the message is sent.

Question 7

The Institute of Electrical and Electronics Engineers (IEEE) is a leading standards-setting organization whose IEEE network standards are the basis for many telecommunications devices and services.

Question 8

With distributed processing, processing devices are placed at remote locations but are connected to each other via a network.

Question 9

Sending an email over the Internet is an example of an asynchronous communication.

Question 10

A half-duplex channel can transmit data in either direction but not both simultaneously.

Question 11

Broadband communications is a telecommunications system that can transmit data very quickly.

Question 12

Telecommunications is creating profound changes in business because it strengthens the barriers of time and distance.

Question 13

A personal area network (PAN) is a wireless network that connects information networking devices within a small area, such as an office, home, or several floors of a building.

Question 14

Twisted-pair wire offers cleaner and crisper data transmission (less noise) than coaxial cable and also a higher data transmission rate.

Question 15

The growth in wireless data traffic is expected to increase modestly over the time period 2013 to 2017.

Question 16

4G will deliver 3 to 20 times the speed of 3G networks for mobile devices.

Question 17

A geostationary satellite orbits the earth at an altitude of less than 1,000 miles.

Question 18

3G wireless communications supports wireless voice and broadband speed data communications in a mobile environment at speeds of 2 to 4 Mbps.

Question 19

Voice and phone communications are examples of asynchronous communications.

Question 20

With centralized processing, multiple computer platforms are dedicated to special functions, such as database management, printing, communications, and program execution.

Question 21

When used for data transmission, coaxial cable falls in the middle of the guided transmission media in terms of cost and performance.

Question 22

_____ is a very short-range wireless connectivity technology designed for consumer electronics, cell phones, and credit cards.

A) Microwave transmission
B) Wireless mesh
C) Near field communication (NFC)
D) Wi-Fi

Question 23

In a _____, all network devices are connected to a common backbone that serves as a shared communications medium.

A) star network
B) bus network
C) ring network
D) mesh network

Question 24

A virtual private network (VPN) supports a secure, encrypted connection between a company's employees and remote users through a third-party service provider.

Question 25

Which of the following statements is true of radio frequency range for wireless communications?

A) It operates in the 300 MHz-300 GHz range.
B) Its costs are increasing.
C) It supports mobile users.
D) It is less susceptible to interception.

Question 26

One of the primary components of electronic funds transfer (EFT) is wire transfer.

Question 27

Cellular transmission uses radio waves, and hence cellular phone conversations are extremely secure.
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Question 28

_____ is a 4G alternative based on a set of IEEE 802.16 wireless metropolitan area network standards that support various types of communications access.

A) Long Term Evolution (LTE)
B) Ultra wideband (UWB)
C) Near Field Communication (NFC)
D) Worldwide Interoperability for Microwave Access (WiMAX)

Question 29

The area covered by one or more interconnected wireless access points is commonly called a(n) _____.

A) reception area
B) hot spot
C) coverage zone
D) access area

Question 30

_____ is a developing network wireless communications frequently used in security systems for sensing and controlling energy-consuming devices.

A) Wi-Fi
B) Bluetooth
C) ZigBee
D) WiMax

Question 31

A disadvantage of a circuit-switching network is that it is associated with the overhead of assembling and disassembling data into packets.

Question 32

A _____ satellite system employs many satellites that are spaced so that, from any point on the Earth at any time, at least one satellite is on a line of sight, each in an orbit at an altitude of less than 1,000 miles.

A) very small aperture terminal (VSAT)
B) microwave
C) low earth orbit (LEO)
D) geostationary

Question 33

A digital subscriber line (DSL) delivers high-speed Internet access to homes and small businesses over the existing phone lines of the local telephone network.

Question 34

A _____ is a telecommunications network that connects users and their computers in a geographical area that spans a campus or a city.

A) metropolitan area network (MAN)
B) local area network (LAN)
C) wide area network (WAN)
D) personal area network (PAN)

Question 35

A _____ is one in which all network devices are connected to one another through a single central device called the hub node.

A) mesh network
B) personal network
C) bus network
D) star network

Question 36

A client is any computer on a network that sends messages requesting services from the servers on the network.

Question 37

Modems can dial telephone numbers, originate message sending, and answer incoming calls and messages.

Question 38

_____ operates like Wi-Fi, only over greater distances and at faster transmission speeds.

A) Broadband
B) ZigBee
C) WiMAX
D) Ultra Wideband

Question 39

Network management software is a system software that controls the computer systems and devices on a network and allows them to communicate with each other.

Question 40

The global positioning system (GPS) uses satellites as reference points to calculate positions on Earth to an accuracy of a few yards or even less.

Question 41

Which of the following provides a simple and consistent user experience across all types of communications, such as instant messaging, fixed and mobile phone, email, voice mail, and web conferencing?

A) Quick response codes
B) Global positioning system applications
C) Radio frequency identification tags
D) Unified communications

Question 42

To determine its position, a global positioning system (GPS) receiver receives the signal from four GPS satellites and determines its exact distance from each satellite.

A) three
B) four
C) five
D) two

Question 43

A _____ is a private network that uses a public network (usually the Internet) to connect multiple remote locations.

A) private branch exchange
B) software defined network
C) network operating system
D) virtual private network

Question 44

A _____ is a telecommunications hardware device that converts communications signals so they can be transmitted over the communication media.

A) register
B) modem
C) multiplexer
D) switch

Question 45

With _____, processing devices are placed at various remote locations, and each device is isolated and does not communicate with any other processing device.

A) distributed processing
B) file processing
C) centralized processing
D) decentralized processing

Question 46

_____ refers to the electronic transmission of signals for communications by means such as telephone, radio, and television.

Question 47

Which of the following is a disadvantage associated with client/server architecture?

A) Moving applications from mainframe computers and?terminal-to-host architecture to client/server architecture incur additional hardware and software support costs.
B) Security mechanisms cannot be implemented directly on the database server in client/server architecture.
C) Moving to client/server architecture is a major two- to five-year conversion process.
D) Client/server architecture maximizes traffic on the network.

Question 48

One way to help protect the security of communications over both wired and wireless networks is to _____.

A) encrypt the data
B) use radio waves
C) enable infrared transmission
D) keep using the same password

Question 49

A(n) _____ is a telephone facility that manages incoming calls, handling them based on the number called and an associated database of instructions.

A) automatic call receiver
B) call handing receiver
C) automatic call distributor
D) call distributing service

Question 50

Which of the following statements is true of the National Do Not Call Registry?

A) The National Do Not Call Registry allows a person to receive calls from political organizations even if he or she has registered with the service.
B) Telemarketers who call numbers on the National Do Not Call Registry list are free from consumer lawsuits.
C) The National Do Not Call Registry has erased several compliance-related issues for direct marketing companies.
D) The Do Not Call Rules require that, at least every 31 days, sellers and telemarketers add to their call lists the numbers found in the registry.

Question 51

A(n) _____ channel permits data transmission in both directions at the same time.

Question 52

Which of the following statements is true of network-management software?

A) One of the disadvantages of network-management software is the large amount of time spent on routine tasks.
B) With network-management software, a manager on a networked personal computer can scan for viruses.
C) Network-management software allows software to being copied, modified, or downloaded legally or illegally.
D) Network-management software complicates the process of updating files and programs on computers on the network.

Question 53

______ service is a communications solution that delivers recorded emergency notifications to users in a selected geographic area.

A) Digital subscriber line
B) Virtual private network
C) Mail-to-text
D) Reverse 911

Question 54

In a(n) _____ network, no fixed path is created between the communicating devices, and the data is broken into packets for sending over the network.

Question 55

_____ are a type of two-dimensional bar code that can be scanned by users with a smartphone camera that is equipped with the appropriate software to display text or connect to a wireless network and open a Web page in the smartphone's browser.

A) Radio frequency identification (RFID) tags
B) Unified communication codes
C) Quick response (QR) codes
D) Smart cards

Question 56

A(n) _____ is any material substance that carries an electronic signal to support communications between a sending and receiving device.

Question 57

Mbps stands for _____.

Question 58

Which of the following statements is true of an asymmetric DSL (ADSL)?

A) It provides high speed Internet access solely to large businesses over the existing phone lines of the local telephone network.
B) It requires an additional phone line to provide "always-on" Internet access.
C) It provides a dedicated connection from each user to the phone company's local telephone office.
D) Its transmission speed remains high even when a subscriber is farther away from the local telephone office.

Question 59

_____ enables users to share a certain number of outside lines (trunk lines) to make telephone calls to people outside an organization.

A) ZigBee
B) Ultra wideband (UWB)
C) A modem
D) A private branch exchange (PBX)

Question 60

Telecommuting is well suited for people who _____.

A) work as real estate agents
B) require frequent face-to-face interaction
C) need much supervision
D) have very short-term deadlines

Question 61

_____ is a form of communications that sends signals at a frequency of 300 GHz and above-higher than those of microwaves but lower than those of visible light.

Question 62

A(n) _____ is a network device that serves as an entrance to another network.

Question 63

_____ is a set of interactive telecommunications technologies that enable people at multiple locations to communicate using simultaneous two-way video and audio transmissions.

Question 64

A(n) _____ is a satellite ground station with a dish antenna smaller than 3 meters in diameter.

Question 65

4G Long Term Evolution (LTE) networks have about 20 times the ______ of 3G networks.

Question 66

_____ is a technology that enables users to send, receive, and store verbal messages to and from other people around the world.

Question 67

The computers and devices on a network are also known as _____.

Question 68

_____ is a form of short-range communications that employs extremely short electromagnetic pulses lasting just 50 to 1,000 picoseconds that are transmitted across a broad range of radio frequencies of several gigahertz.

Question 69

A(n) _____ is a location where an organization handles customer and other telephone calls, usually with some amount of computer automation.

Question 70

Long Term Evolution (LTE) is a standard for wireless communications for mobile phones based on ______.

Question 71

_____ transmission involves the broadcast of communications in one of three frequency ranges: microwave, radio, and infrared.

Question 72

_____ is a wireless communications specification that describes how cell phones, computers, and printers can be connected over distances of 10 to 30 feet at a rate of about 2 Mbps and allows users of multifunctional devices to synchronize information.

Question 73

_____ is a developing network wireless communications standard designed to carry small amounts of data at fairly low bandwidth of 20 Kbps to 250 Kbps over midrange distances or 100 meters or so using very little power.

Question 74

_____ is a system of transferring money from one bank account directly to another without any paper money changing hands.

Question 75

A(n) _____ is a miniature cellular base station designed to provide improved cellular coverage and capacity for homes and organizations and even metropolitan and rural public spaces.

Question 76

_____ is a process that enables the sending and receiving of documents in a digital form without being printed (although printing is possible).

Question 77

Because only two devices participate in the communications, Near Field Communication (NFC) establishes a(n) _____ network.

Question 78

_____ is a common form of guided transmission media that uses extremely thin strands of glass bound together in a sheathing and transmits signals with light beams.

Question 79

A(n) ______ is a telecommunications device that forwards data packets between computer networks.

Question 80

A(n) ______ is a telecommunications network that connects large geographic areas.