Deck 6: Data Communication: Delivering Information Anywhere and Anytime

Question 1

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

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

Answer 1

C

Question 2

Distributed processing maintains decentralized control and centralized operations.

Answer 2

False

Question 3

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

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

Answer 3

A

Question 4

A communication network shortens product and service development life cycles and delivers information to those who need it faster and more efficiently.

Question 5

Data transfer rates of local area networks (LANs)are typically below 100 Mbps.

Question 6

Wireless network traffic can be captured with sniffers.

Question 7

Data transmission channels are generally divided into two types: broadband and narrowband.

Question 8

In a typical data communication system,which of the following statements is true of a sender and receiver device?

A)An input / output device has processing power.
B)A smart terminal is a full-featured computer.
C)A workstation can serve as a stand-alone system.
D)A netbook computer is a high-cost computer with disks.

Question 9

Any packet-switching network can handle multimedia data.

Question 10

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

Question 11

Which of the following is an important application of data communication systems for managers to contact decision makers located throughout the world?

A)E-collaboration
B)E-banking
C)E-governance
D)E-learning

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

Protocols help ensure compatibility between different manufacturers' devices.

Question 17

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

Question 18

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

Question 19

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

A)pen drive
B)modem
C)cookie
D)applet

Question 20

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

Question 21

The _____ layer of the Open Systems Interconnection (OSI)model generates a 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
B)presentation
C)session
D)transport

Question 22

Transmission of data across satellites is through _____.

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

Question 23

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

A)speed of its interconnections
B)distance between its links
C)thickness of its connecting cable
D)size of its adjoining terminals

Question 24

The _____ layer of the Open Systems Interconnection (OSI)model specifies 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
B)transport
C)physical
D)data link

Question 25

The _____ layer of the Open Systems Interconnection (OSI)model serves as the window through which computer programs access network services.

A)application
B)presentation
C)network
D)data link

Question 26

A network _____ represents a network's physical layout.

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

Question 27

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

A)session
B)application
C)presentation
D)network

Question 28

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

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

Question 29

Identify a layer of the Open Systems Interconnection (OSI)model that provides methods for controlling data flow,ordering received data,and acknowledging received data.

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

Question 30

Identify an advantage of centralized processing.

A)It ensures a tight control over system operations and applications.
B)It ensures that the response to users' needs is abundant.
C)It ensures data is securely shielded from other users as it is processed at one system.
D)It ensures the processing power is distributed among several locations.

Question 31

Which of the following media is based on line of sight?

A)Terrestrial microwave
B)STP wire
C)Coaxial cable
D)Fiber-optic cable

Question 32

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

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

Question 33

_____ cables have the highest bandwidth of any communication medium.

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

Question 34

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 (WANs)in metropolitan areas
D)provide communication services spanning several cities or states

Question 35

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 36

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

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

Question 37

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

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

Question 38

A(n)_____ cable is used to connect computers,hubs,switches,and routers to a network.

A)Ethernet
B)fiber optic
C)coaxial
D)patch

Question 39

Identify a true statement about distributed processing.

A)It solves the lack of coordination in centralized processing.
B)It solves the lack of responsiveness in centralized processing.
C)It solves the lack of security in decentralized processing.
D)It solves the lack of individuality in decentralized processing.

Question 40

Computers in a local area network (LAN)are usually connected to the network via a(n)_____,which is a hardware component.

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

Question 41

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

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

Question 42

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 43

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

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

Question 44

_____ is responsible for packet forwarding.

A)Internet Protocol (IP)
B)Transmission Control Protocol (TCP)
C)User Datagram Protocol (UDP)
D)Extensible Authentication Protocol (EAP)

Question 45

A routing table lists _____.

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

Question 46

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 (TDMA)
B)Transmission Control Protocol (TCP)
C)Mobile Telephone Switching Office (MTSO)
D)Code Division Multiple Access (CDMA)

Question 47

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

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

Question 48

Identify the layer of the Open Systems Interconnection (OSI)model in which the Internet Protocol (IP)operates.

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

Question 49

Identify a true statement about the types of client / server architecture.

A)A two-tier architecture allows easy upgrades to applications.
B)An n-tier architecture helps improve network performance.
C)A two-tier architecture allows a client-server communication using an application.
D)An n-tier architecture tests software easily.

Question 50

Identify an advantage of the bus topology.

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

Question 51

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 52

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

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

Question 53

Identify a topology used by traditional mainframe networks.

A)Ring topology
B)Star topology
C)Mesh topology
D)Hierarchical topology

Question 54

Which of the following allows the linking of devices running on many different platforms?

A)Time Division Multiple Access (TDMA)
B)Transmission Control Protocol (TCP)
C)Mobile Telephone Switching Office (MTSO)
D)Code Division Multiple Access (CDMA)

Question 55

In a _____,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)bus topology
D)mesh topology

Question 56

Identify an advantage of a hierarchical topology over a star topology.

A)The hierarchical topology offers a great deal of network control,compared to the star topology.
B)The hierarchical topology is more effective at handling heavy but short bursts of traffic,compared to the star topology.
C)The hierarchical topology allows network expansion easily,compared to the star topology.
D)The hierarchical topology's cable layouts are easy to modify,compared to the star topology.

Question 57

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

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

Question 58

A hierarchical topology is also called a _____ topology.

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

Question 59

Identify the layer of the Open Systems Interconnection (OSI)model in which the Transmission Control Protocol (TCP)operates.

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

Question 60

Horizontal scaling of client / server architecture means _____.

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

Question 61

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

Question 62

A _________ is typically used to connect workstations and peripheral devices that are in close proximity.

A)controller area network (CAN)
B)metropolitan area network (MAN)
C)wide area network (WAN)
D)local area network (LAN)

Question 63

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

A)radiated
B)conducted
C)digitized
D)centralized

Question 64

In data communication,_____ is a packet-switching service that operates at 25 Mbps and 622 Mbps.

A)Gigabit Ethernet
B)Asynchronous Transfer Mode (ATM)
C)3G network
D)IP multimedia subsystem (IMS)

Question 65

A(n)_________ processing 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
B)decentralized
C)distributed
D)interconnected

Question 66

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

A)multiplexer
B)CIA triangle
C)controller
D)RF spectrum

Question 67

_________ is a technique to improve the security of wireless networks,which combines the strongest features of Wired Equivalent Privacy (WEP)and Extensible Authentication Protocol (EAP)techniques.

A)SSID (Service Set Identifier)
B)WEP (Wired Equivalent Privacy)
C)EAP (Extensible Authentication Protocol)
D)WPA (Wi-Fi Protected Access)​

Question 68

In the _________ architecture,the application logic is usually on the client side.

A)session tier
B)two-tier
C)middle-tier
D)data tier

Question 69

A _________ works well for companies that are geographically dispersed.

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

Question 70

_________ is a set of rules that govern data communication,including error detection,message length,and transmission speed.

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

Question 71

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

A)controller area network (CAN)
B)metropolitan area network (MAN)
C)wide area network (WAN)
D)local area network (LAN)​

Question 72

_________ is a voice-grade transmission channel capable of transmitting a maximum of 56,000 bps,so only a limited amount of information can be transferred in a specific period of time.

A)Narrowband
B)Waveband
C)Broadband
D)Sideband

Question 73

_________ 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)Routing

Question 74

In _________ routing,one node is in charge of selecting the path for all packets.

A)centralized
B)decentralized
C)distributed
D)clashed

Question 75

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

A)recurrence
B)convergence
C)telepresence
D)coexistence

Question 76

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

A)Transmission Control Protocol (TCP)
B)client / server
C)Open Systems Interconnection (OSI)
D)Basic Input / Output

Question 77

Identify a true statement about convergence in data communication.

A)It changes the path that data takes each time a connection is made.
B)It allows 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 is used to synchronize devices before establishing a communication link.

Question 78

A master key is obtained using which a user's computer and access point (AP)negotiate for a key that will be used for a session and is discarded once the session is terminated.Which of the following techniques helps obtain this master key?

A)SSID (Service Set Identifier)
B)WEP (Wired Equivalent Privacy)
C)UDP (User Datagram Protocol)
D)WPA2 (Wi-Fi Protected Access 2)

Question 79

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

A)radiated
B)conducted
C)digitized
D)decentralized

Question 80

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 (IP)
B)Service Set Identifier (SSID)
C)Wired Equivalent Privacy (WEP)
D)Extensible Authentication Protocol (EAP)