Deck 6: Data Communication: Delivering Information Anywhere and Anytime

Question 1

Terrestrial microwave uses space-based transmitters and receivers and is often used for point-to-point links between buildings.

Answer 1

False

Question 2

Protocols help ensure compatibility between different manufacturers' devices.

Answer 2

True

Question 3

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

Answer 3

False

Question 4

Many cables are required for a star topology.

Question 5

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

Question 6

A wide area network can only use one type of communication media in the network - coaxial cables.

Question 7

When phone lines are used for Internet connections,a digital modem is necessary to convert a computer's digital signals to analog signals.

Question 8

It is important to separate an organization's core functions from the data communication systems that support them.

Question 9

Centralized processing is the primary configuration used in data communications today.

Question 10

Communication media connect sender and receiver devices.

Question 11

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

Question 12

An Ethernet cable is used to connect computers,hubs,switches,and routers to a network.

Question 13

Ethernet is a standard communication protocol embedded in software and hardware devices used for building a LAN.

Question 14

Radiated media use an antenna for transmitting data through air or water.

Question 15

Databases and input / output devices can be distributed.

Question 16

All Internet connections require a modem.

Question 17

In the Open Systems Interconnection model,the session layer is responsible for formatting message packets.

Question 18

Fiber-optic cables have a higher capacity,smaller size,lighter weight,lower attenuation,and higher security than other cable types.

Question 19

Local area networks(LANs)are used most often to isolate resources.

Question 20

In a point-to-point system,several devices share the same medium simultaneously.

Question 21

The ____ layer of the 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
B)Presentation
C)Session
D)Transport

Question 22

A service set identifier is the part of a wirelessLAN that connects it to other networks.

Question 23

Any packet-switching network can handle multimedia data.

Question 24

____ 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)Coaxial
D)Fiber-optic

Question 25

In the context of mobile networking,the 3G network has increased the quality of Internet Telephony or Voice over Internet Protocol.

Question 26

____ media operate on line-of-sight.

A)Terrestrial microwave
B)Multipoint
C)Coaxial
D)Fiber optic

Question 27

A mesh is a hardware and software device that controls the data transfer from a computer to a peripheral device and vice versa.

Question 28

The ____ layer of the OSI model serves as the window through which applications access network services.

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

Question 29

Internet protocol is responsible for packet forwarding.

Question 30

The ____ layer of the 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 31

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

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

Question 32

In _____ data transmission,multiple pieces of data are sent simultaneously.

A)narrowband
B)wide area
C)broadband
D)modular

Question 33

A hub can choose the best possible path for packets based on distance and cost.

Question 34

The ring topology needs more cable than a star topology.

Question 35

Wireless network traffic can be captured with sniffers.

Question 36

The most common n-tier architecture is the three-tier architecture.

Question 37

The _____ layer of the OSI model formats message packets.

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

Question 38

A bridge connects two LANs using the same protocol,and the communication medium must be the same on both LANs.

Question 39

____ cables are thick cables that can be used for both data and voice transmissions.

A)Conductive
B)Broadcast
C)Coaxial
D)Base

Question 40

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

A)bandwidth
B)controller
C)router
D)protocol

Question 41

A ____ router can build tables that identify addresses on each network.

A)pervasive
B)passive
C)dynamic
D)static

Question 42

The most common n-tier architecture involves ____ tiers.

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

Question 43

LANs are used most often to ____.

A)integrate services, such as e-mail and file sharing
B)link computers that are geographically far apart
C)provide Internet service to cellular phones including smartphones
D)provide wireless networking services

Question 44

In the context of the technologies developed to improve the efficiency and quality of digital communications,____ divide(s)each channel into six time slots.

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

Question 45

A network ____ represents a network's physical layout.

A)hierarchy
B)model
C)protocol
D)topology

Question 46

Traditional mainframe networks use a ____ topology.

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

Question 47

Another name for a network interface card is a(n)____.

A)Ethernet
B)adapter card
C)network card
D)local area network

Question 48

The ____ topology is costly and difficult to maintain and expand.

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

Question 49

A routing table lists ____.

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

Question 50

What is the first step in client / server communication?

A)The results are formatted and displayed.
B)The server receives the query.
C)The client accepts a request.
D)The user creates a query.

Question 51

____ scaling refers to adding more workstations (clients).

A)Static
B)Dynamic
C)Vertical
D)Horizontal

Question 52

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

A)spoofing
B)convergence
C)telepresence
D)teleprocessing

Question 53

A hierarchical topology is also called a ____ topology.

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

Question 54

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

A)multiplexer
B)controller
C)router
D)front-end processor

Question 55

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

A)convergence
B)divergence
C)roaming
D)routing

Question 56

In a bus topology,____ are used at each end of the cable to absorb the signal.

A)emulators
B)terminators
C)stoppers
D)nodes

Question 57

Within the ____ technique for wireless security,a user's computer and the AP use a master key to negotiate for a key that will be used for a session.

A)Wired Equivalent Privacy
B)Service Set Identifier
C)Wi-Fi Protected Access
D)Wi-Fi Protected Access 2

Question 58

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)wireless area
D)horizontal

Question 59

____ is using a cellular phone outside of a carrier's limited service area.

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

Question 60

The Transmission Control Protocol (TCP)operates at the OSI model's ____ layer.

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

Question 61

Briefly describe the type of connection technology a cable modem uses and its typical speed.

Question 62

In a star topology,the ____________________ computer supplies the main processing power.

Question 63

A(n)____________________ is a collection of binary digits,including message data and control characters for formatting and transmitting,sent from computer to computer over a network.

Question 64

Both WirelessLANs and WirelessWANs rely on the ____________________ as the communication medium.

Question 65

A ____________________ is short for modulator-demodulator.

Question 66

What is an intelligent terminal?

Question 67

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

Question 68

What are coaxial cables? How are they used?

Question 69

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

Question 70

____________________ topology works well for companies that are geographically dispersed.

Question 71

In a (n)____________________ architecture,the presentation logic is always on the client,and the data management logic is on the server.

Question 72

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

Question 73

____________________ 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.

Question 74

____________________ media include twisted pair cable,coaxial cable,and fiber optics.

Question 75

A(n)____________________ network connects workstations and peripheral devices that are in close proximity.

Question 76

A(n)____________________ network is designed to handle data communication for multiple organizations in a city and sometimes nearby cities,too.

Question 77

Provide several examples of how data communication systems can improve the flexibility of data collection and transmission?

Question 78

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

Question 79

List the three main components of a typical data communication system.

Question 80

____________________ are rules that govern data communication,including error detection,message length,and transmission speed.