Deck 6: Data Communication: Delivering Information Anywhere and Anytime

Question 1

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

Answer 1

True

Question 2

Wireless network traffic can be captured with sniffers.

Answer 2

True

Question 3

WPA (Wi-Fi Protected Access)keys are longer than WEP (Wired Equivalent Privacy)keys, and are therefore more difficult to break.

Answer 3

True

Question 4

Protocols are devices that connect users to the Internet.

Question 5

Gigabit Ethernet is a LAN transmission standard capable of 1 Gbps and 10 Gbps data transfer speeds.

Question 6

Unlike the other disadvantages of wireless, throughput is expected to become a bigger problem in the future.

Question 7

Any packet-switching network can handle multimedia data.

Question 8

The data transfer speeds of local area networks (LANs)typically range from 100 Mbps to 10 Gbps.

Question 9

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

Question 10

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

Question 11

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

Question 12

Data communication systems increase inventory costs.

Question 13

A company's BYOD strategy requires employees to use the organization's computers, tablets, smartphones, or other devices for work purposes.

Question 14

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

Question 15

Distributed processing maintains decentralized control and centralized operations.

Question 16

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

Question 17

Terrestrial microwave systems use Earth-based transmitters and receivers for transmitting data.

Question 18

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

Question 19

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

Question 20

EAP (Extensible Authentication Protocol)keys are dynamically generated based on the user's SSID and password.

Question 21

Which statement 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 22

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 23

_____ have the highest bandwidth of any communication medium.

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

Question 24

Virtual meetings are not considered cost effective applications of data communication systems for managers.

Question 25

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

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

Question 26

The Internet and data communication systems facilitate lifelong learning.

Question 27

Which problem 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 28

_____ 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 29

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 30

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

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

Question 31

Identify a true statement about the different forms of sender and receiver devices.

A)Thin clients have no processing power.
B)Smart terminals are full-featured computers.
C)Workstations are the same as supercomputers.
D)Netbook computers do not save data to servers.

Question 32

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

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

Question 33

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

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

Question 34

_____ 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 35

In the context of data communication, a _____ is based on "line of sight."

A)twisted pair wire
B)satellite
C)coaxial cable
D)fiber-optic cable

Question 36

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

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

Question 37

The decrease in telecommuters is an example of how the boundaries between work and personal life are becoming less clear-cut as data communication becomes more available in both homes and businesses.

Question 38

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 39

_____ 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 40

_____ 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 41

Which 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)Data Link
D)Physical

Question 42

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 43

_____ is the physical link between a network and a workstation.

A)The session layer
B)An adapter card
C)An html address
D)A network topology

Question 44

Which layer of the Open Systems Interconnection (OSI)model formats message packets?

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

Question 45

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 46

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

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

Question 47

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

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

Question 48

_____ 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 49

A hierarchical topology is also called a _____ topology.

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

Question 50

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.

Question 51

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 52

A network _____ represents a network's physical layout.

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

Question 53

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

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

Question 54

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 55

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

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

Question 56

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 57

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 58

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 59

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

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

Question 60

_____ is responsible for packet forwarding.

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

Question 61

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

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

Question 62

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

A)Throughput
B)Attenuation
C)A topology
D)A protocol

Question 63

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)wireless
D)non-guided

Question 64

Which event 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 65

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 66

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 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

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 69

In the early days of computer technology, which   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

Question 70

In the context of data communication, which 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 71

_____  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

Question 72

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 73

Which statement 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 74

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 75

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 76

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 77

In the context of security of wireless networks, which 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 78

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

Question 79

In the two-tier architecture of the client\server model, _____.

A)the presentation logic is always on the client
B)the data management logic is always on the client
C)the application logic is always on the server
D)the application logic is always on the client

Question 80

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