CS200-Chapter8-Homework

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1 Class: Date: CS200-Chapter8-Homework Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Computer communications describes a process in which two or more computers or devices transfer. a. data c. instructions b. information d. all of the above 2. A communications is a transmission medium on which the data, instructions, or information travels. a. route c. flow b. channel d. path 3. Text messaging, also called, allows users to send and receive short text messages on a smart phone or mobile device. a. TMS c. SMS b. TXT d. TXS 4. Wireless is a real-time Internet communications service that allows you to exchange messages with one or more mobile or online users. a. PIM c. PDA b. GPS d. IM 5. messaging, also called MMS, allows users to send graphics, pictures, video clips, and sound files, as well as short text messages to another smart phone, PDA, or computer. a. Image c. Picture b. Graphics d. Unicode 6. Some services use the term video to refer separately to the capability of sending video clips. a. circuiting c. messaging b. posting d. spotting 7. A(n) is a wireless network that provides Internet connections to mobile computers and other devices. a. wi-spot c. quick spot b. hot link d. hot spot 8. All of the following are hot spot technologies EXCEPT. a. Wi-Fi c. IrDA b. WiMAX d. Bluetooth 9. A(n) is a coffeehouse or restaurant that provides personal computers with Internet access to its customers. a. cybercafé c. baseband b. wi-spot d. quick spot 10. A document system provides for storage and management of a company s documents and allows users to access the documents, depending on their needs. a. analysis c. preparation b. management d. storage 1

2 11. services describe standardized software that enables programmers to create applications that communicate with other remote computers over the Internet or over an internal business network. a. Remote c. Server b. Client d. Web 12. A(n) is a Web application that combines services from two or more sources, creating a new application. a. pileup c. workgroup b. mashup d. worknet 13. As shown in the accompanying figure, a is a network that covers a large geographical area, such as a city, country, or the world. a. WAN c. MAN b. LAN d. WLAN 2

3 14. As shown in the accompanying figure, the is the world s largest WAN. a. Internet c. Web b. Telnet d. Usenet 15. As shown in the accompanying figure, a(n) is a network that uses a communications channel combining many types of media such as telephone lines, cables, and radio waves. a. EFT c. LAN b. MAN d. WAN 16. As shown in the accompanying figure, on a(n) network one or more computers acts as a server and the other computers on the network request services from the server. a. integrated c. client/server b. baseband d. workgroup 3

4 17. As shown in the accompanying figure, a(n) controls access to the hardware, software, and other resources on the network and provides a centralized storage area for programs, data, and information. a. workgroup c. document manager b. server d. file manager 18. BitTorrent and Gnutella are examples of networking software that support networking technology, as illustrated in the accompanying figure. a. LAN c. ring b. bus d. P2P 19. A P2P network like the one in the accompanying figure sometimes is called a(n) network. a. bus c. communications b. file sharing d. RFID 20. A type of peer-to-peer network shown in the accompanying figure, called, describes an Internet network, on which users access each other s hard disks and exchange files directly. a. file exchanging c. sending network b. P2P d. FTTH 4

5 21. A network, like the one shown in the accompanying figure, refers to the layout of the computers and devices in a communications network. a. topology c. latency b. mapping d. volume 22. On a(n) network like the one in the accompanying figure, all of the computers and devices on the network connect to a central device. a. ring c. token ring b. star d. bus 23. A network consists of a single central cable, to which all computers and other devices connect. a. ring c. token ring b. star d. bus 24. A(n) is an internal network that uses Internet technologies. a. workgroup c. intranet b. sharenet d. ATM 5

6 25., or , is a newer network standard developed by IEEE that specifies how wireless devices communicate over the air in a wide area. a. ISDN c. T3 b. CATV d. WiMAX 26. Which is the fastest type of line? a. ISDN c. T3 b. CATV d. ATM 27. A(n) line is any of several types of long-distance digital telephone lines that carry multiple signals over a single communications line. a. ATM c. DSL b. ADSL d. T-carrier 28. Telephone networks, the Internet, and other networks with large amounts of traffic use. a. DSL c. ISDN b. T1 lines d. ATM 29. A(n) device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device. a. channel c. network b. communications d. licensed 30. A(n) card is a USB network adapter, ExpressCard module, PC Card, or flash card that enables a computer or device to access a network. a. channel c. communications b. network d. licensed 31. A(n) is a communications device that connects multiple computers or routers together and transmits data to its correct destination on the network. a. multiplexer c. router b. concord d. index 32. Most home networks use a Wi-Fi network, which sends signals through the air at distances of up to feet in some configurations. a. 50 c. 150 b. 100 d. 1, All of the following are types of wired home networks EXCEPT. a. Ethernet c. phoneline network b. powerline cable network d. WLAN 34. The amount of data, instructions, or information that can travel over a communications channel sometimes is called the. a. dimensionality c. bandwidth b. resolution d. broadband 35. Physical transmission media used in communications include cable. a. twisted-pair c. fiber-optic b. coaxial d. all of the above 6

7 36. is an electrical disturbance that can degrade communications. a. RFID c. Chatter b. Noise d. A hot spot 37. The core of a(n) cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals. a. coaxial c. fiber-optic b. twisted-pair d. integrated 38. radio is a wireless transmission medium that distributes radio signals through the air over long distances such as between cities, regions, and countries and short distances such as within an office or home. a. Mobile c. Bandless b. Optical d. Broadcast 39. Bluetooth, UWB, Wi-Fi, and WiMAX communications technology use. a. T1 lines c. infrared b. broadcast radio signals d. microwaves 40. With a satellite Internet connection,. a. downlinks are slower than uplinks b. uplinks are slower than downlinks c. uplinks and downlinks go at the same speed d. uplink and downlink speeds vary depending on geographical factors True/False Indicate whether the statement is true or false. 41. All types of computers and mobile devices serve as sending and receiving devices in a communications system. 42. An online meeting allows users to share documents with others in real time. 43. Home users are the primary users of Web services. 44. A computer voice mail system converts an analog voice message into digital form. 7

8 45. Because of their small size, most client/server networks like the one shown in the accompanying figure do not require a person to serve as a network administrator. 46. WAP uses a client/server network like the one in the accompanying figure. 47. A print server is a kind of integrated server. 48. In a peer-to-peer network, each computer has its own printer. 49. Peer-to-peer networks are ideal for large corporations. 50. Networks rarely combine the various kinds of networking topologies that are available. 8

9 51. The bus in a bus network like the one in the accompanying figure transmits data, instructions, and information in only one direction. 9

10 52. On a star network like the one in the accompanying figure, if one node fails, the devices after the failed device cannot function. 53. Bus networks are popular on LANs because they are inexpensive and easy to install. 54. Ethernet is based on a star topology. 55. In a token ring network, only one token exists per network. 56. Token ring networks can connect an unlimited number of devices also is known as Wi-Fi. 58. Using a dial-up line to transmit data is similar to using the telephone to make a call in that it is not permanent. 59. ADSL is faster when sending data than when receiving data. 60. Some experts predict that ISDN will become the Internet standard for data transmission, replacing T3 lines. 10

11 61. The most popular T-carrier line is the T3 line. 62. An analog signal consists of individual electrical pulses that represent bits grouped together into bytes. 63. A digital signal consists of a continuous electrical wave. 64. A dial-up modem usually is in the form of a standalone piece of hardware attached to the computer by a USB cable. 65. Baseband media transmit multiple signals simultaneously. 11

Discovering Computers 2008. Chapter 9 Communications and Networks

Discovering Computers 2008. Chapter 9 Communications and Networks Discovering Computers 2008 Chapter 9 Communications and Networks Chapter 9 Objectives Discuss the the components required for for successful communications Identify various sending and receiving devices