Deck 6: Data Communication: Delivering Information Anywhere and Anytime

Question 1

When phone lines are used for Internet connections,data transmission is possible without the use of analog modems.

Answer 1

False

Question 2

A star topology uses a large number of cables to connect the nodes within a network.

Answer 2

True

Question 3

Communication media are used to connect sender and receiver devices.

Answer 3

True

Question 4

All Internet connections require a modem.

Question 5

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

Question 6

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

Question 7

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

Question 8

Protocols help ensure compatibility between different manufacturers' devices.

Question 9

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

Question 10

Fiber-optic cables have the lowest bandwidth of any communication medium.

Question 11

Coaxial cables are incompatible with wide area networks (WANs).

Question 12

Distributed processing configuration maintains decentralized control and centralized operations.

Question 13

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

Question 14

The ring topology needs more cable than a star topology.

Question 15

Data communication systems are significantly apart from an organization's core functions.

Question 16

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

Question 17

Radiated media use a fiber-optic cable for transmitting data through air or water.

Question 18

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

Question 19

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

Question 20

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

Question 21

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

Question 22

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

Question 23

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

Question 24

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

Question 25

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

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

Question 26

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

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

Question 27

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 28

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

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

Question 29

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

Question 30

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

Question 31

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

A) Terrestrial microwaves
B) Broadcast radios
C) Coaxial cables
D) Satellites

Question 32

When a bridge connects two local area networks (LANs) using the same protocol,the communication medium must be the same on both LANs.

Question 33

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 34

Wireless network traffic can be captured with sniffers.

Question 35

Coaxial cables are used mainly for:

A) local area networks.
B) television signals.
C) short-distance telephone transmissions.
D) broadcast radio.

Question 36

_____ 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 37

Any packet-switching network can handle multimedia data.

Question 38

Internet protocol (IP) is responsible for packet forwarding.

Question 39

_____ 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 40

A router operates at the Application layer of the Open Systems Interconnection (OSI) model.

Question 41

_____ cables have the highest bandwidth of any communication medium.

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

Question 42

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 43

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

A) multiplexer
B) controller
C) database
D) client system

Question 44

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 45

A network _____ represents a network's physical layout.

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

Question 46

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 47

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

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

Question 48

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

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

Question 49

A hierarchical topology is also called a _____ topology.

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

Question 50

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 51

Traditional mainframe networks use a _____ topology.

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

Question 52

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

A) Ethernet
B) adapter card
C) IP address
D) network protocol

Question 53

The Transmission Control Protocol (TCP) operates at the Open Systems Interconnection (OSI) model's _____ layer.

A) data link
B) physical
C) transport
D) network

Question 54

Which of the following is the first action to take place in the most basic client / server configuration?

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

Question 55

Local area networks (LANs) are used to _____.

A) integrate services, such as e-mail and file sharing
B) link computers that are geographically far apart
C) connect various WANs in metropolitan areas
D) provide communication services spanning several cities or states

Question 56

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 57

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

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

Question 58

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

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

Question 59

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

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

Question 60

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 61

In the context of different network types,a(n) _____ is designed to handle data communication for multiple organizations in a city and sometimes nearby cities as well.

Question 62

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 63

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

Question 64

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 65

_____ 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 66

In the context of different network types,a(n) _____ is typically used to connect workstations and peripheral devices that are in close proximity.

Question 67

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

A) attenuation
B) convergence
C) telepresence
D) routing

Question 68

_____ 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.

Question 69

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

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

Question 70

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

Question 71

In a(n) _____ architecture,the application logic is usually on the client side.

Question 72

A(n) _____ topology works well for companies that are geographically dispersed.

Question 73

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

Question 74

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

Question 75

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

Question 76

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 77

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

Question 78

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

Question 79

In the context of different processing configurations,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.

Question 80

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