Review Questions - UNCW Faculty and Staff.rtf by censhunay

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									Review Questions

Chapter 9 Communications and Networks

Student: ______________________________________________________________________

1.   One of the most dramatic changes in connectivity and communications in the past five
     years has been

     A.   mobile or wireless telephones.
     B.   chat rooms.
     C.   satellite uplinks.
     D.   running programs on remote computers.

2.   Which among the following assimilate messages in the form of data, information, and/or
     instructions?

     A.   Communication channel
     B.   Sending and receiving devices
     C.   Connection devices
     D.   Data transmission specifications

3.   Sending incoming and outgoing information in the form of packets is a feature of

     A.   connection devices.
     B.   sending and receiving devices.
     C.   storage devices.
     D.   secondary devices.

4.   Which physical connection is the fastest?

     A.   Twisted pair
     B.   Coaxial cable
     C.   Fiber-optics
     D.   Microwaves
5.   Which among the following is considered a line of sight communication medium?

     A.   Broadcast radio
     B.   Satellite communication
     C.   Bluetooth
     D.   Infrared

6.   Most Web-enabled communication devices follow a standard called _____ to connect to
     computers and to the Internet.

     A.   FireWire
     B.   Bluetooth
     C.   TCP/IP
     D.   Wi-FI

7.   Bluetooth uses ______ to transmit data over short distances.

     A.   microwaves
     B.   infrared
     C.   satellite communications
     D.   optic fibers

8.   To _____ is to send data to a satellite.

     A.   uplink
     B.   downlink
     C.   modulate
     D.   demodulate

9.   The device installed in your car which gives you navigational support is a

     A.   Gradiometer
     B.   Argos Beacon
     C.   Redshift guide
     D.   Global positioning system

10. A widely available technology that uses existing telephone lines to provide high-speed
    connections is called

     A.   ISDN.
     B.   microwave.
     C.   cable modem.
     D.   DSL.
11. In specific metropolitan areas devices such as cell phones and appropriately equipped
    laptop computers can download and upload data from the Internet using

     A.   Modems.
     B.   Satellites.
     C.   DSL.
     D.   3G cellular networks.

12. The capacity of a communication channel is measured in

     A.   bandwidth.
     B.   bit capacity.
     C.   band rate.
     D.   data flow.

13. The greatest capacity for data transmission happens in ____ devices.

     A.   voiceband
     B.   medium band
     C.   broadband
     D.   mega-band

14. A unique numeric address used by the computer to deliver e-mail and to locate Web sites is
    called the

     A.   domain address.
     B.   protocol address.
     C.   IP address.
     D.   Web address.

15. ____ is the process of breaking down information sent or transmitted across the Internet
    into small parts called packets.

     A.   Protocol
     B.   Bandwidth
     C.   Reformatting
     D.   Identification

16. The essential features of this include identifying sending and receiving devices, and
    reformatting information for transmission across the Internet.

     A.   Simple mail transfer protocol
     B.   Transmission control protocol
     C.   File transfer protocol
     D.   Hypertext transfer protocol
17. The ______ is the central node for all the other nodes connected to the network.

     A.   client
     B.   server
     C.   hub
     D.   gateway

18. A computer system in which computer power is shared by several separate computers
    linked by a communications network is called a

     A.   distributed processing.
     B.   hierarchical processing.
     C.   network processing.
     D.   centralized processing.

19. This device enables connectivity between two LANs or a LAN and a larger network.

     A.   Network gateway
     B.   Switcher
     C.   Hub
     D.   Router

20. This network configuration can be used to support a time-sharing system.

     A.   Star
     B.   Ring
     C.   Bus
     D.   Hierarchical

21. A network configuration in which all attached devices handle their own communications
    without the use of a central server is called a ____ network.

     A.   star
     B.   bus
     C.   ring
     D.   hierarchical

22. A network in which the central computer is a host to a cluster of other computers that in
    turn are hosts is called a ____ network.

     A.   star
     B.   bus
     C.   ring
     D.   hierarchical
23. If the majority of the processing power is centralized in one large computer and the nodes
    connected to it have little or no processing capability, it is called a ____ network.

     A.   hybrid
     B.   terminal
     C.   peer-to-peer
     D.   hierarchical

24. The Gnutella network is a popular _____ network system used to share all kinds of files.

     A.   terminal
     B.   peer-to-peer
     C.   client/server
     D.   hierarchical

25. A special computer that checks all communication that passes through it between a
    company's internal networks and the outside world is called a

     A.   base station.
     B.   node.
     C.   supercomputer.
     D.   proxy computer.

26. Communications devices are the actual connecting or transmission medium that carries the
    message.

     True False

27. Telephone lines use coaxial cables.

     True False

28. Fiber-optic cables transmit information using beams of light at light speeds instead of
    pulses of electricity.

     True False

29. Modulation is the name of the process of converting from digital to analog.

     True False

30. TCP/IP protocol involves identifying, sending and receiving devices and reformatting
    information for transmission across the Internet.

     True False
31. A prototype is a set of rules that governs data transmission.

     True False

32. Reformatting refers to breaking information into small parts called packets.

     True False

33. In a network environment, a client provides resources for the servers.

     True False

34. A host computer is generally a centralized, mini or mainframe that provides resources and
    processing for several terminals.

     True False

35. WANs are widely used by organizations to link microcomputers and to share printers and
    other resources.

     True False

36. A network gateway can be used to connect the LAN of one office group to the LAN of
    another office group.

     True False

37. The most common cabling standard in LANs is called Ethernet.

     True False

38. A network that is jointly owned and operated upon by a group of organizations is called
    MAN.

     True False

39. Network architecture describes how a computer network is configured and what strategies
    are employed.

     True False

40. The bus network is used commonly to link microcomputers to a mainframe to allow access
    to an organization's database.

     True False
41. When only a few microcomputers are to be linked, then the bus network is typically used.

     True False

42. When working with UNIX, the star and hierarchical networks are commonly used.

     True False

43. In a peer-to-peer network, only the central host computer supplies the resources, the other
    computers request resources from this host.

     True False

44. The client/server network strategy can handle very large networks efficiently.

     True False

45. With respect to P2P, there is an abundant amount of powerful management software that
    effectively monitors a large network's activities.

     True False

								
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