Deck 6: Data Communication: Delivering Information Anywhere and Anytime

Question 1

Protocols are devices that connect users to the Internet.

Answer 1

False

Question 2

Terrestrial microwave systems use radio control transmitters and receivers for transmitting data.

Answer 2

False

Question 3

Distributed processing maintains decentralized control and centralized operations.

Answer 3

False

Question 4

A hierarchical topology is also called a _____.

A) layered topology
B) mixed topology
C) tree topology
D) vertical topology

Question 5

Wireless network traffic can be captured with sniffers.

Question 6

The bus topology connects nodes along a network segment, with the ends connected in a manner similar to a ring topology.

Question 7

A _____ represents a network's physical layout.

A) network utility
B) network packet
C) network protocol
D) network topology

Question 8

In the context of mobile networking, 3G networks have decreased the quality of Internet telephony or Voice over Internet Protocol (VoIP).

Question 9

Which of the following problems is resolved by distributed processing?

A) Lack of coordination in centralized processing
B) Lack of responsiveness in centralized processing
C) Lack of security in decentralized processing
D) Lack of individuality in decentralized processing

Question 10

The data transfer speeds of local area networks (LANs) are typically below 100 Mbps.

Question 11

In a centralized processing system, processing power is distributed among several locations.

Question 12

In the context of data communication, which of the following is true of convergence?

A) It changes the path that data takes each time a connection is made.
B) It allows the transmission of a limited amount of information in a specific period of time.
C) It requires major network upgrades, because video requires much more bandwidth.
D) It synchronizes devices before establishing a communication link.

Question 13

Narrowband is capable of transmitting a maximum of 60,000 bps.

Question 14

Ethernet is a standard communication protocol embedded in software and hardware devices used for building a local area network (LAN).

Question 15

Any packet-switching network can handle multimedia data.

Question 16

Data communication systems increase inventory costs.

Question 17

A(n) _____ is a device that connects a user to the Internet.

A) drafter
B) modem
C) cookie
D) applet

Question 18

Data communication technologies make Web and video conferencing easier, which can reduce the costs of business travel.

Question 19

A ring topology needs more cables to connect the nodes within a network than a star topology.

Question 20

An access point (AP) is the part of a wireless local area network (WLAN) that connects it to other networks.

Question 21

__________is the loss of power in a signal as it travels from the sending device to the receiving device.

A) Attenuation
B) Convergence
C) Throughput
D) Bandwidth
E) Select

Question 22

In the bus topology, a hardware device called _____ is used at each end of the cable to absorb the transmitted signal.

A) emulator
B) terminator
C) stopper
D) node

Question 23

A _____ is a network operating on a radio frequency (RF), consisting of radio cells, each served by a fixed transmitter.

A) dynamic network
B) mobile network
C) mesh network
D) wired network

Question 24

_____ is responsible for packet forwarding.

A) Internet Protocol
B) Transmission Control Protocol
C) User Datagram Protocol
D) Extensible Authentication Protocol

Question 25

Identify an advantage of centralized processing.

A) It helps in exercising tight control over system operations and applications.
B) It is highly responsive to users' needs.
C) It has the highest fault tolerance.
D) It is highly compatible with organizational growth because workstations can be added easily.

Question 26

Which of the following statements is true of the different forms of sender and receiver devices?

A) Thin clients have processing power.
B) Smart terminals are full-featured computers.
C) Workstations serve as stand-alone systems.
D) Netbook computers are high-cost computers with disks.

Question 27

A(n) _____ is a network connection device that can build tables that identify addresses on each network.

A) switch
B) adapter card
C) dynamic router
D) hub

Question 28

The__________is a seven-layer architecture for defining how data is transmitted from computer to computer in a network.

A) Transmission Control Protocol model
B) client/server model
C) Open Systems Interconnection model
D) basic input/output model
E) Select

Question 29

The _____ of the Open Systems Interconnection (OSI) model formats message packets.

A) Session layer
B) Application layer
C) Presentation layer
D) Network layer

Question 30

_____ have the highest bandwidth of any communication medium.

A) Coaxial cables
B) Fiber-optic cables
C) Twisted pair copper cables
D) Ethernet cables

Question 31

Transmission Control Protocol operates at the _____ of the Open Systems Interconnection (OSI) model.

A) Network layer
B) Physical layer
C) Transport layer
D) Data Link layer

Question 32

The _____ of the Open Systems Interconnection (OSI) model generates the receiver's address and ensures the integrity of messages by making sure packets are delivered without error, in sequence, and with no loss or duplication.

A) Application layer
B) Presentation layer
C) Session layer
D) Transport layer

Question 33

In _____ data transmission, multiple pieces of data are sent simultaneously to increase the transmission rate.

A) narrowband
B) baseband
C) broadband
D) sideband

Question 34

__________is a set of rules that governs data communication, including error detection, message length, and transmission speed.

A) Throughput
B) Attenuation
C) Topology
D) Protocol
E) Select

Question 35

__________is a voice-grade transmission channel capable of transmitting a maximum of 56,000 bps.

A) Narrowband
B) Baseband
C) Broadband
D) Sideband
E) Select

Question 36

_____ is the amount of data that can be transferred from one point to another in one second.

A) Bandwidth
B) Packet
C) Latency
D) Protocol

Question 37

A network interface card (NIC) operates at the Open Systems Interconnection (OSI) model's _____ layers.

A) Presentation and Application
B) Session and Presentation
C) Network and Transport
D) Physical and Data Link

Question 38

Local area networks (LANs) are used to _____.

A) integrate services to a single building or campus
B) link computers that are geographically far apart
C) connect various wide area networks in metropolitan areas
D) provide communication services spanning several cities or states

Question 39

In the context of communication media,__________provide a physical path along which signals are transmitted, including twisted pair copper cable, coaxial cable, and fiber optics.

A) radiated media
B) conducted media
C) wireless media
D) non-guided media
E) Select

Question 40

In the context of data communication, which of the following media is based on "line of sight"?

A) A terrestrial microwave
B) A mechanical wave
C) A coaxial cable
D) A fiber-optic cable

Question 41

_____ are used to connect computers, hubs, switches, and routers to a network in a local area network (LAN).

A) Ethernet cables
B) Satellites
C) Fiber-optic cables
D) Terrestrial microwaves

Question 42

In data communication, _____ refers to integrating voice, video, and data so that multimedia information can be used for decision making.

A) immersion
B) convergence
C) telepresence
D) integration

Question 43

_____ are conducted media that can be used for both data and voice transmissions.

A) Terrestrial microwaves
B) Broadcast radios
C) Coaxial cables
D) Satellite dishes

Question 44

Which of the following statements is true of the types of client/server architectures?

A) An n-tier architecture tests software easily.
B) An n-tier architecture helps improve network performance.
C) A two-tier architecture allows easy upgrades of applications.
D) A two-tier architecture requires minor modifications in case of any changes in application logic.

Question 45

A__________is typically used to connect workstations and peripheral devices that are in close proximity.

A) controller area network
B) metropolitan area network
C) wide area network
D) local area network
E) Select

Question 46

A__________is a collection of binary digits, including message data and control characters for formatting and transmitting, sent from computer to computer over a network.

A) bandwidth
B) packet
C) topology
D) protocol
E) Select

Question 47

Compared with a star topology, a hierarchical topology:

A) allows network expansion more easily.
B) has cable layouts that are easy to modify.
C) offers a great deal of network control and lower cost.
D) is more effective at handling heavy but short bursts of traffic.

Question 48

A routing table lists _____.

A) nodes on a network
B) the IP address of a router
C) the protocols that each node understands
D) packets to be sent

Question 49

A__________is designed to handle data communication for multiple organizations in a city and sometimes nearby cities as well.

A) controller area network
B) metropolitan area network
C) wide area network
D) local area network
E) Select

Question 50

The _____ of the Open Systems Interconnection (OSI) model provides services that support users' tasks, such as file transfers, database access, and e-mail.

A) Application layer
B) Presentation layer
C) Network layer
D) Data Link layer

Question 51

A__________works well for companies that are geographically dispersed.

A) ring topology
B) star topology
C) mesh topology
D) hierarchical topology
E) Select

Question 52

Transmission of data across satellites is an example of data communication through _____.

A) conducted media
B) radiated media
C) induced media
D) uprooted media

Question 53

In__________, one node is in charge of selecting the path for all packets.

A) centralized routing
B) decentralized routing
C) distributed routing
D) clashed routing
E) Select

Question 54

The _____ of the Open Systems Interconnection (OSI) modelspecifies the electrical connections between computers and the transmission medium and is primarily concerned with transmitting binary data, or bits, over a communication network.

A) Application layer
B) Transport layer
C) Data Link layer
D) Physical layer

Question 55

In the context of security of wireless networks, which of the following is true of Wired Equivalent Privacy (WEP)?

A) It is suitable for large networks with high bandwidths.
B) It is the most secure system for wireless networks.
C) In WEP, keys are dynamically generated based on the user's ID and password.
D) In WEP, a key must be entered manually into the access point and the client computer.

Question 56

Horizontal scaling of a client/server architecture means _____.

A) migrating the network to decentralized servers
B) migrating the network to a faster communication media
C) adding more proxy servers
D) adding more workstations

Question 57

A _____ is a hardware device that allows several nodes to share one communication channel.

A) multiplexer
B) controller
C) terminator
D) router

Question 58

_____ is the electronic transfer of data from one location to another.

A) Data communication
B) Data interpretation
C) Data mining
D) Data exchange

Question 59

In the early days of computer technology, a(n)__________system was justified because data-processing personnel were in short supply, hardware and software were expensive, and only large organizations could afford computers.

A) centralized processing
B) decentralized processing
C) distributed processing
D) interconnected processing
E) Select

Question 60

_____ are glass tubes surrounded by concentric layers of glass, called "cladding," to form a light path through wire cables.

A) Twisted pair cables
B) Copper line cables
C) Air-spaced coaxial cables
D) Fiber-optic cables

Question 61

Which of the following events takes place in the most basic client/server configuration?

A) The results of a query are sent to the server.
B) The server sends a request to the client over a network.
C) The client receives and processes a query.
D) The user creates a query by running client software.

Question 62

_____ is a high-speed carrier service that uses ordinary phone circuits to send and receive data.

A) An analog modem
B) Digital subscriber line
C) Code division multiple access
D) A cable modem

Question 63

Communication media that use an antenna for transmitting data through air or water are called__________.

A) radiated media
B) conducted media
C) wired media
D) guided media
E) Select

Question 64

__________is a technique that combines the strongest features of Wired Equivalent Privacy (WEP) and Extensible Authentication Protocol (EAP) techniques and helps improve the security of wireless networks.

A) Service Set Identifier
B) Media access control
C) Code Division Multiple Access
D) Wi-Fi Protected Access
E) Select

Question 65

In _____, each department has its own computer for performing and controlling processing tasks.

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

Question 66

In a(n) _____, if any link between nodes is severed, the entire network is affected, and failure of a single node disrupts the entire network.

A) star topology
B) ring topology
C) octagonal topology
D) mesh topology

Question 67

_____ refers to using a cellular phone outside of a carrier's limited service area.

A) Routing
B) Teleprocessing
C) Roaming
D) Surfing

Question 68

Both Wireless LANs (WLANs) and Wireless WANs (WWANs) rely on the__________as the communication medium.

A) multiplexer
B) CIA triangle
C) controller
D) radio frequency spectrum
E) Select

Question 69

In the context of the technologies developed to improve the efficiency and quality of digital communications, _____ divides each channel into six time slots.

A) Time Division Multiple Access
B) time of observation
C) statistical time division multiplexing
D) Time Slot Allocation

Question 70

Internet Protocol (IP) operates at the _____ of the Open Systems Interconnection (OSI) model.

A) Transport layer
B) Physical layer
C) Data Link layer
D) Network layer

Question 71

In the context of data communication, which of the following is true of e-collaboration?

A) It improves customer service.
B) It reduces decision makers' effectiveness.
C) It increases the cost involved in data communication.
D) It promotes face-to-face interactions among individuals.

Question 72

In the__________, the application logic is usually on the client side.

A) session tier architecture
B) two-tier architecture
C) middle-tier architecture
D) data tier architecture
E) Select

Question 73

The computers in a local area network (LAN) are usually connected to the network via a hardware component called a(n) _____.

A) broadcast radio
B) adapter card
C) html address
D) network protocol

Question 74

The data transfer speed of a wide area network (WAN) depends on the speed of _____.

A) its interconnections
B) its application layers
C) the expansion of the data source
D) the expansion of the data sink

Question 75

_____ allows the linking of devices running on many different platforms.

A) Time Division Multiple Access
B) Transmission Control Protocol/Internet Protocol
C) A mobile telephone switching office
D) A public switched telephone network

Question 76

In data communication, the _____ is a packet-switching service that operates at 25 Mbps and 622 Mbps, with maximum speed of up to 10 Gbps.

A) 4G network
B) Asynchronous Transfer Mode
C) 3G network
D) IP multimedia subsystem

Question 77

The process of deciding which path data takes on a network is called _____.

A) converging
B) diverging
C) roaming
D) routing

Question 78

Identify a topology used by traditional mainframe networks.

A) A ring topology
B) A star topology
C) A mesh topology
D) A hierarchical topology

Question 79

The Wi-Fi Protected Access 2 (WPA2) uses _____ to obtain a master key, which is in turn used to negotiate for a key that will be used for a session.

A) Internet Protocol
B) Service Set Identifier
C) Wired Equivalent Privacy
D) Extensible Authentication Protocol

Question 80

Identify an advantage of the bus topology.

A) It makes fault diagnosis easy.
B) It detects problems easily due to its centralized control.
C) It handles steady traffic well.
D) It is effective even when network traffic is heavy.