信息系统复习参考7

Management Information Systems, 12e (Laudon)

Chapter 7 Telecommunications, the Internet, and Wireless Technology

1) Telephone networks are fundamentally different from computer networks. Answer: TRUE Diff: 2 Page Ref: 247 AACSB: Use of IT CASE: Comprehension Objective: 7.1

2) Increasingly, voice, video, and data communications are all based on Internet technology. Answer: TRUE Diff: 1 Page Ref: 247 AACSB: Use of IT CASE: Comprehension Objective: 7.1

3) To create a computer network, you must have at least two computers. Answer: TRUE Diff: 2 Page Ref: 247 AACSB: Use of IT CASE: Comprehension Objective: 7.1

4) An NOS must reside on a dedicated server computer in order to manage a network. Answer: FALSE Diff: 2 Page Ref: 248 AACSB: Use of IT CASE: Comprehension Objective: 7.1

5) A hub is a networking device that connects network components and is used to filter and forward data to specified destinations on the network. Answer: FALSE Diff: 2 Page Ref: 248 AACSB: Use of IT CASE: Comprehension Objective: 7.1

6) In a client/server network, a network server provides every connected client with an address so it can be found by others on the network. Answer: TRUE Diff: 2 Page Ref: 2350 AACSB: Use of IT CASE: Comprehension Objective: 7.1

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7) Central large mainframe computing has largely replaced client/server computing. Answer: FALSE Diff: 2 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.1

8) Circuit switching makes much more efficient use of the communications capacity of a network than does packet switching. Answer: FALSE Diff: 1 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.1

9) A protocol is a standard set of rules and procedures for the control of communications in a network.

Answer: TRUE Diff: 1 Page Ref: 251 AACSB: Use of IT CASE: Comprehension Objective: 7.1

10) Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms. Answer: TRUE Diff: 1 Page Ref: 252 AACSB: Use of IT CASE: Comprehension Objective: 7.1

11) In a ring topology, one station transmits signals, which travel in both directions along a single transmission segment. Answer: FALSE Diff: 3 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

12) Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire. Answer: TRUE Diff: 1 Page Ref: 255 AACSB: Use of IT CASE: Comprehension Objective: 7.2

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13) Fiber-optic cable is more expensive and harder to install than wire media. Answer: TRUE Diff: 2 Page Ref: 255 AACSB: Use of IT CASE: Comprehension Objective: 7.2

14) The number of cycles per second that can be sent through any telecommunications medium is measured in kilobytes. Answer: FALSE Diff: 2 Page Ref: 257 AACSB: Use of IT CASE: Comprehension Objective: 7.2

15) The Domain Name System (DNS) converts IP addresses to domain names. Answer: TRUE Diff: 3 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.3

16) VoIP technology delivers video information in digital form using packet switching. Answer: TRUE Diff: 1 Page Ref: 264 AACSB: Use of IT CASE: Comprehension Objective: 7.3

17) Web 3.0 is a collaborative effort to add a layer of meaning to the existing Web in order to reduce the amount of human involvement in searching for and processing Web information. Answer: TRUE Diff: 2 Page Ref: 275 AACSB: Reflective Thinking CASE: Comprehension Objective: 7.3

18) Wi-Fi enables users to freely roam from one hotspot to another even if the next hotspot is using different Wi-Fi network services. Answer: FALSE Diff: 3 Page Ref: 278 AACSB: Use of IT CASE: Comprehension Objective: 7.4

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19) WiMax has a wireless access range of up to 31 miles. Answer: TRUE Diff: 3 Page Ref: 279 AACSB: Use of IT CASE: Comprehension Objective: 7.4

20) RFID has been exceptionally popular from the technology's inception because of its low implementation costs. Answer: FALSE Diff: 2 Page Ref: 280 AACSB: Use of IT CASE: Comprehension Objective: 7.5

21) The device that acts as a connection point between computers and can filter and forward data to a specified destination is called a(n) A) hub. B) switch. C) router. D) NIC. Answer: B Diff: 1 Page Ref: 248 AACSB: Use of IT CASE: Comprehension Objective: 7.1

22) The Internet is based on which three key technologies? 互联网是基于哪三关键技术？ A) tcp/ip、HTML 和 HTTP B) tcp/ip、HTTP 和分组交换

C) 客户端/服务器计算、分组交换和通信标准的开发, 用于连接网络和计算机 D) 客户端/服务器计算、数据包交换和 HTTP A) TCP/IP, HTML, and HTTP

B) TCP/IP, HTTP, and packet switching

C) client/server computing, packet switching, and the development of communications standards for linking networks and computers

D) client/server computing, packet switching, and HTTP Answer: C Diff: 2 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.3

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23) The method of slicing digital messages into parcels, transmitting them along different communication paths, and reassembling them at their destinations is called A) multiplexing. B) packet switching. C) packet routing. D) ATM.

将数字信息切片成包裹的方法, 沿不同的通信路径传输它们, 并在其目的地重新组装它们, 称为

A) 多路复用。 B) 分组交换。 C) 数据包路由。 D) ATM 机。 Answer: B Diff: 1 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.3

24) The telephone system is an example of a _ circuit-switched _ network. A) peer-to-peer B) wireless

C) packet-switched D) circuit-switched Answer: D Diff: 1 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.2

25) Which of the following is not a characteristic of packet switching? A) Packets travel independently of each other.

B) Packets are routed through many different paths. C) Packet switching requires point-to-point circuits.

D) Packets include data for checking transmission errors. 数据包交换的特征是什么？以下哪一个是不？ A) 数据包相互独立旅行。

B) 数据包通过许多不同的路径路由。 C) 分组交换需要点对点电路。

D) 包包括用于检查传输错误的数据。

Answer: C Diff: 2 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.1

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26) In TCP/IP, IP is responsible for

A) disassembling and reassembling of packets during transmission. A) 在传输过程中拆卸和重新组装数据包。

B) establishing an Internet connection between two computers. C) moving packets over the network. D) sequencing the transfer of packets. Answer: A Diff: 3 Page Ref: 251 AACSB: Use of IT CASE: Comprehension Objective: 7.3

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27) In a telecommunications network architecture, a protocol is

A) a device that handles the switching of voice and data in a local area network. B) a standard set of rules and procedures for control of communications in a network. C) a communications service for microcomputer users. D) the main computer in a telecommunications network. 、在电信网络体系结构中, 协议是

a) 一种在局域网中处理语音和数据交换的设备。 B) 一套标准和程序, 用于控制网络中的通信。 C) 为微型计算机用户提供通信服务。 D) 电信网络中的主要计算机。

Answer: B Diff: 2 Page Ref: 251 AACSB: Use of IT CASE: Comprehension Objective: 7.1

28) What are the four layers of the TCP/IP reference model? A) physical, application, transport, and network interface B) physical, application, Internet, and network interface C) application, transport, Internet, and network interface D) application, hardware, Internet, and network interface

tcp/ip 参考模型的四层是什么？ APP—传输—因特网—network A) 物理、应用程序、传输和网络接口 B) 物理、应用、互联网和网络接口

C) 应用程序、传输、Internet 和网络接口 D) 应用程序、硬件、互联网和网络接口

Answer: C Diff: 3 Page Ref: 251-252 AACSB: Use of IT CASE: Comprehension Objective: 7.3

29) Which signal types are represented by a continuous waveform? A) laser B) optical C) digital

D) analog 模拟信号

哪些信号类型由连续波形表示？ A) 激光 B) 光学 C) 数字 D) 模拟

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Answer: D Diff: 2 Page Ref: 252 AACSB: Use of IT CASE: Comprehension Objective: 7.1

30) To use the analog telephone system for sending digital data, you must also use A) a modem. 调制解调器 B) a router. C) DSL.

D) twisted wire. Answer: A Diff: 1 Page Ref: 252 AACSB: Use of IT CASE: Comprehension Objective: 7.1

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31) Which type of network is used to connect digital devices within a half-mile or 500-meter radius?

31) 哪种网络用于在半英里或500米半径内连接数字设备？ A) microwave B) LAN 局域网

C) WAN 广域网 D) MAN Answer: B Diff: 2 Page Ref: 253 AACSB: Use of IT CASE: Comprehension Objective: 7.2

32) Which of the following Internet connection types offers the greatest bandwidth? 以下哪种互联网连接类型提供最大带宽？ A) T3 B) DSL C) cable D) T1

Answer: A Diff: 2 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.3

33) Which type of network would be most appropriate for a business that comprised three employees and a manager located in the same office space, whose primary need is to share

documents? 哪种类型的网络最适合于一个由三名雇员组成的企业和一个位于同一办公空间的经理, 其主要需要是共享文件？

A) wireless network in infrastructure mode B) domain-based LAN

C) peer-to-peer network C) 对等网络 D) campus area network Answer: C Diff: 2 Page Ref: 253-254 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.2

34) In a bus network

A) signals are broadcast to the next station.

B) signals are broadcast in both directions to the entire network. C) multiple hubs are organized in a hierarchy.

D) messages pass from computer to computer in a loop.

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Answer: B Diff: 2 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

35) All network components connect to a single hub in a ________ topology. 所有网络组件都连接到一个拓扑中的单个集线器。 A) star B) bus C) domain D) peer-to-peer Answer: A Diff: 2 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

36) The most common Ethernet topology is 最常见的以太网拓扑结构是 A) bus. B) star. C) ring. D) mesh. Answer: A Diff: 3 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

37) A network that spans a city, and sometimes its major suburbs as well, is called a 一个横跨城市的网络, 有时也是它的主要郊区, 被称为MAN A) CAN. B) MAN. C) LAN. D) WAN. Answer: B Diff: 1 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

38) A network that covers broad geographical regions is most commonly referred to as a(n) 38) 覆盖广泛地理区域的网络通常称为 a (n) A) local area network. B) intranet.

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C) peer-to-peer network.

D) wide area network. --WAN Answer: D Diff: 1 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

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39) _ Cell phones work by using radio waves to communicate with radio antennas placed within adjacent geographic areas.

通过使用无线电波与相邻地理区域内的无线电天线通信进行工作。 A) Cell phones B) Microwaves C) Satellites D) WANs Answer: A Diff: 1 Page Ref: 257 AACSB: Use of IT CASE: Comprehension Objective: 7.2

40) Bandwidth is the

A) number of frequencies that can be broadcast through a medium. B) number of cycles per second that can be sent through a medium.

C) difference between the highest and lowest frequencies that can be accommodated on a single channel.

D) total number of bytes that can be sent through a medium per second. 带宽是

a) 可以通过媒体广播的频率数。 B) 每秒可通过介质发送的周期数。

C) 可在单个通道上容纳的最高和最低频率之间的差异。 D) 每秒可通过媒体发送的总字节数。 Answer: C Diff: 2 Page Ref: 257 AACSB: Use of IT CASE: Comprehension Objective: 7.2

41) The total amount of digital information that can be transmitted through any telecommunications medium is measured in 可透过任何电讯媒介传送的数字资料总额, 以 A) bps。单位UNIT B) 赫兹。 C) 波特。

D) gigaflops。 A) bps. B) Hertz. C) baud. D) gigaflops. Answer: A Diff: 2 Page Ref: 257 AACSB: Use of IT CASE: Comprehension

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Objective: 7.2

42) Digital subscriber lines 数字用户线路

A) 使用现有电话线进行语音、数据和视频的操作。

A) operate over existing telephone lines to carry voice, data, and video. B) operate over coaxial lines to deliver Internet access.

C) are very-high-speed data lines typically leased from long-distance telephone companies. D) have up to twenty-four 64-Kbps channels. Answer: A Diff: 2 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.2

43) T lines

A) operate over existing telephone lines to carry voice, data, and video. B) operate over coaxial lines to deliver Internet access.

C) are high-speed, leased data lines providing guaranteed service levels. C) 是高速、租用的数据线, 提供保证的服务水平。 D) have up to twenty-four 64-Kbps channels. Answer: C Diff: 2 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.2

44) Which protocol is the Internet based on? 哪一种协议是基于互联网的？ A) TCP/IP B) FTP

C) packet-switching D) HTTP Answer: A Diff: 1 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.3

45) Which of the following is not an advantage of using VOIP?

A) VOIP can reduce a firm's communication costs by 20 to 30 percent. B) It allows e-mail and voice mail to be combined into a single directory. C) It enables the creation of two distinct networks for voice and data.

D) It allows new phones to be added to a network without rewiring or reconfiguring the network. 以下哪一项是不使用 VOIP 的优点？

a) VOIP 可以将公司的通信成本降低20到30%。

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B) 它允许将电子邮件和语音邮件合并到一个目录中。 C) 它可以创建两个不同的语音和数据网络。

D) 它允许将新手机添加到网络中, 而无需重新布线或配置网络。

Answer: C Diff: 2 Page Ref: 265 AACSB: Use of IT CASE: Comprehension Objective: 7.3

46) The child domain of the root is the 根的子域是

A) top-level domain. B) second-level domain. C) host name.

D) domain extension. Answer: A Diff: 2 Page Ref: 258 AACSB: Use of IT CASE: Comprehension Objective: 7.3

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47) In the domain name \and third-level domains, respectively? A) \B) \C) \D) \Answer: C Diff: 2 Page Ref: 258-259 AACSB: Use of IT CASE: Comprehension Objective: 7.3

48) Which organization helps define the overall structure of the Internet? 哪个组织有助于定义互联网的总体结构？ A) none (no one \B) W3C C) ICANN D) IAB Answer: D Diff: 3 Page Ref: 260 AACSB: Use of IT CASE: Comprehension Objective: 7.3

49) IPv6 is being developed in order to 正在开发 IPv6, 以

A) update the packet transmission protocols for higher bandwidth.

B) create more IP addresses. 创造更多的饿IP地址 C) allow for different levels of service. D) support Internet2. Answer: B Diff: 2 Page Ref: 261 AACSB: Use of IT CASE: Comprehension Objective: 7.3

50) Which of the following services enables logging on to one computer system and working on another?

下列哪种服务能够登录到一个计算机系统并在另一个系统上工作？---FTP A) FTP 迅雷 B) LISTSERV C) Telnet

D) World Wide Web Answer: A Diff: 3 Page Ref: 261

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AACSB: Use of IT CASE: Comprehension Objective: 7.3

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51) Instant messaging is a type of _chat_ service. 即时消息是一种聊天服务类型。 A) chat B) cellular C) e-mail D) wireless Answer: A Diff: 1 Page Ref: 264 AACSB: Use of IT CASE: Comprehension Objective: 7.3

52) Which of the following distinguishes wikis*（维基百科） from blogs?

A) Wikis allow users to add content, whereas blogs are created by a single person. B) Blogs are personal publishing tools, while Wikis have business uses.

C) Wikis require some knowledge of Web programming, whereas blogs are designed to be created by people without HTML skills of any kind.

D) Wikis allow users to modify content created by other users, whereas blogs only allow comments to posted material.

以下哪一项将 wiki 与博客区别开来？

A) wiki 允许用户添加内容, 而博客是由一个人创建的。 B) 博客是个人发布工具, wiki 有商业用途。

C) wiki 需要一些关于 Web 编程的知识, 而博客设计是由没有任何 HTML 技能的人创建的。 D) wiki 允许用户修改由其他用户创建的内容, 而博客只允许评论张贴的材料。

Answer: D Diff: 2 Page Ref: 273

AACSB: Ethical Understanding and Reasoning Abilities CASE: Analysis in terms of appraise Objective: 7.3

53) _ Unified communications_ integrate(s) disparate channels for voice communications, data communications, instant messaging, e-mail, and electronic conferencing into a single experience. 将语音通信、数据通信、即时消息、电子邮件和电子会议的不同通道集成到单个体验中。 A) Wireless networks B) Intranets

C) Virtual private networks D) Unified communications A) 无线网络 B) 内部网

C) 虚拟专用网络 D) 统一通信

Answer: D

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Diff: 1 Page Ref: 265 AACSB: Use of IT CASE: Comprehension Objective: 7.3

54) A VPN VPN

a) 是在公用网络中配置的加密专用网络。

A) is an encrypted private network configured within a public network. B) is more expensive than a dedicated network.

C) provides secure, encrypted communications using Telnet.

D) is an Internet-based service for delivering voice communications. Answer: A Diff: 2 Page Ref: 268 AACSB: Use of IT CASE: Comprehension Objective: 7.3

55) Web browser software requests Web pages from the Internet using which protocol? web 浏览器软件请求互联网上使用哪个协议的网页？HTTP A) URL B) HTTP C) DNS D) HTML Answer: B Diff: 2 Page Ref: 269 AACSB: Use of IT CASE: Comprehension Objective: 7.3

56) Together, a protocol prefix, a domain name, a directory path, and a document name, are called a(n) 在一起, 协议前缀、域名、目录路径和文档名称称为 a (n) A) 统一资源定位器。

A) uniform resource locator. B) IP address.

C) third level domain. D) root domain. Answer: A Diff: 2 Page Ref: 269 AACSB: Use of IT CASE: Comprehension Objective: 7.3

57) The most common Web server today, controlling 54 percent of the market, is 当今最常见的网络服务器, 控制着54% 的市场, 是 A) Microsoft IIS.

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B) WebSTAR

C) Apache HTTP Server. D) Netscape Server. Answer: C Diff: 2 Page Ref: 269 AACSB: Use of IT CASE: Comprehension Objective: 7.3

58) Which of the following statements is not true about search engines?

58) 对于搜索引擎, 下列哪个语句是不正确的？

A) 他们可以说是互联网的 \杀手应用程序\。

B) 他们解决了用户如何在互联网上即时找到信息的问题。 C) 它们几乎完全是通过搜索引擎营销来进行货币化的。

A) They are arguably the Internet's \

B) They have solved the problem of how users instantly find information on the Internet. C) They are monetized almost exclusively by search engine marketing.

D) There are hundreds of search engines vying for user attention, with no clear leader having yet emerged.

D) 有数以百计的搜索引擎争夺用户的注意力, 没有明确的领导者尚未出现。 Answer: D Diff: 1 Page Ref: 269-270 AACSB: Use of IT CASE: Comprehension Objective: 7.3

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59) The process of employing techniques to help a Web site achieve a higher ranking with the major search engines is called

使用技术帮助网站达到更高的排名与主要搜索引擎的过程称为 SEO A) VPN. B) IAB. C) SEM. D) SEO. Answer: D Diff: 1 Page Ref: 270 AACSB: Use of IT CASE: Comprehension Objective: 7.3

60) What technology allows people to have content pulled from Web sites and fed automatically to their computers?

什么技术允许人们从网站上提取内容并自动送入计算机？RSS A) FTP B) RSS C) HTTP D) Bluetooth Answer: B Diff: 2 Page Ref: 273 AACSB: Use of IT CASE: Comprehension Objective: 7.3

61) Which of the following is not one of the four defining features of Web 2.0? A) interactivity

B) real-time user control C) cloud computing D) social participation

以下哪一个是不Web 2.0 的四定义功能之一？ A) 交互性

B) 实时用户控制 C) 云计算---web3.0 D) 社会参与

Answer: C Diff: 3 Page Ref: 272 AACSB: Use of IT CASE: Comprehension Objective: 7.3

62) Which of the following statements is true?

A) GSM is the primary U.S. digital cellular standard.

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B) CDMA's strength is in its international roaming capabilities.

C) CDMA randomly随机 assigns分配 users to a range of frequencies over time. D) GSM was developed by the military during World War II. 下列哪项陈述属实？

A) GSM 是美国的主要数字蜂窝标准。 B) CDMA 的实力在于其国际漫游能力。

C) CDMA 随机分配用户的频率范围内一段时间。 D) GSM 是在二战期间由军方开发的。

Answer: C Diff: 3 Page Ref: 276 AACSB: Use of IT CASE: Comprehension Objective: 7.4

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63) Which of the following standards is most appropriate for creating a PAN? 以下哪个标准最适合于创建平底锅？蓝牙 A) WiMax

B) IEEE 802.11b C) WiFi D) Bluetooth Answer: D Diff: 2 Page Ref: 276 AACSB: Use of IT CASE: Comprehension Objective: 7.4

64) Bluetooth can be used to link up to _eight_ devices within a 10-meter area using low-power, radio-based communication. 蓝牙最多可以连接8个用户 A) four B) six C) eight D) ten

Answer: C Diff: 3 Page Ref: 276 AACSB: Use of IT CASE: Comprehension Objective: 7.4

65) The 802.11 set of standards for wireless LANs is known as A) Wi-Fi. B) WiMax. C) Bluetooth. D) RFID. Answer: A Diff: 1 Page Ref: 277 AACSB: Use of IT CASE: Comprehension Objective: 7.4

66) One or more access points positioned on a ceiling, wall, or other strategic spot in a public place to provide maximum wireless coverage for a specific area are referred to as

在公共场所的天花板、墙壁或其他战略地点设置一个或多个接入点, 以便为特定区域提供最大的无线覆盖范围, 称为

A) touch points.

B) hotspots.热点 wlan-wifi C) hot points. D) wireless hubs. Answer: B Diff: 2 Page Ref: 278

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AACSB: Use of IT CASE: Comprehension Objective: 7.4

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67) The next evolution in wireless communication is 下一代的无线通讯 A) 3G networks. B) 2.5G networks. C) WiMax. D) RFID.

无线通信的下一个发展趋势是 A) 3G 网络。 B) 2.5G 网络。 C) WiMax。 D) RFID。

Answer: C Diff: 2 Page Ref: 276 AACSB: Use of IT CASE: Comprehension Objective: 7.4

68) The WiMax standard can transmit up to a distance of approximately A) 30 meters. B) 500 meters.

C) 30 miles. 30英里 D) 5 miles. Answer: C Diff: 3 Page Ref: 279 AACSB: Use of IT CASE: Comprehension Objective: 7.4

69) Passive RFID tags 无源 RFID 标签

B) 有好几英尺的范围。

A) have their own power source. B) have a range of several feet.

C) enable data to be rewritten and modified.

D) are used in automated toll-collection systems. Answer: B Diff: 2 Page Ref: 280 AACSB: Use of IT CASE: Comprehension Objective: 7.5

射频识别，RFID（Radio Frequency Identification）技术，又称无线射频识别，是一种通信技术，可通过无线电讯号识别特定目标并读写相关数据，

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70) Which of the following would you be most likely to use RFID technology for? 您最有可能使用 RFID 技术的是下列哪一种？ A) 跟踪库存

A) tracking inventory B) enabling CRM systems C) lowering network costs

D) enabling client communication Answer: A Diff: 2 Page Ref: 279-280 AACSB: Analytic Skills CASE: Comprehension Objective: 7.5

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71) The ________ is special software that routes and manages communications on the network and coordinates networks resources. Answer: network operating system/NOS Diff: 2 Page Ref: 248 AACSB: Use of IT CASE: Comprehension Objective: 7.1

72) A(n) ________ is a device that forwards packets of data through different networks, ensuring that the data gets to the right address. Answer: router Diff: 2 Page Ref: 248 AACSB: Use of IT CASE: Comprehension Objective: 7.1

73) ________ computing is a distributed computing model in which some of the processing power is

located within small, inexpensive client computers. Answer: Client/server Diff: 2 Page Ref: 250 AACSB: Use of IT CASE: Comprehension Objective: 7.3

74) A(n) ________ signal is a discrete, binary waveform that transmits data coded into two discrete states such as 1-bits and 0-bits. Answer: digital Diff: 2 Page Ref: 252 AACSB: Use of IT CASE: Comprehension Objective: 7.2

75) ________ is the manner in which the components of a network are connected. Answer: Topology Diff: 2 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

76) ________ is the dominant LAN standard at the physical network level. Answer: Ethernet Diff: 2 Page Ref: 254 AACSB: Use of IT CASE: Comprehension Objective: 7.2

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77) A(n) ________ is a commercial organization with a permanent connection to the Internet that sells temporary connections to retail subscribers. Answer: Internet service provider Diff: 2 Page Ref: 257 AACSB: Use of IT CASE: Comprehension Objective: 7.3

78) The backbone networks of the Internet are typically owned by long-distance telephone companies called ________.

Answer: network service providers Diff: 2 Page Ref: 259 AACSB: Use of IT CASE: Comprehension Objective: 7.3

79) A(n) ________ is software for locating and managing stored Web pages. Answer: Web server Diff: 2 Page Ref: 269 AACSB: Use of IT CASE: Comprehension Objective: 7.3

80) A(n) ________ is a box consisting of a radio receiver/transmitter and antennas that links to a wired network, router, or hub. Answer: access point Diff: 2 Page Ref: 277 AACSB: Use of IT CASE: Comprehension Objective: 7.1

81) How does packet switching work?

Answer: Packet switching is a method of slicing digital messages into parcels called packets, sending the packets along different communication paths as they become available, and then reassembling the packets once they arrive at their destinations. Packet switching makes much more efficient use of the communications capacity of a network than did circuit-switching. In packet-switched networks, messages are first broken down into small fixed bundles of data called packets. The packets include information for directing the packet to the right address and for checking transmission errors along with the data. The packets are transmitted over various communications channels using routers, each packet traveling independently. Packets of data originating at one source will be routed through many different paths and networks before being reassembled into the original message when they reach their destinations. Diff: 2 Page Ref: 250 AACSB: Analytic Skills

CASE: Analysis in terms of summarize Objective: 7.1

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82) Identify the layers of the Department of Defense reference model for TCP/IP, and describe how this model works.

Answer: The application layer enables client application programs to access the other layers and defines the protocols that applications use to exchange data. One of these application protocols is the Hypertext Transfer Protocol (HTTP), which is used to transfer Web page files. The transport layer is responsible for providing the application layer with communication and packet services. This layer includes TCP and other protocols. The Internet layer is responsible for addressing, routing, and packaging data packets called IP datagrams. The Internet Protocol is one of the protocols used in this layer. At the bottom of the reference model, the network interface layer is responsible for placing packets on and receiving them from the network medium, which could be any networking technology. Data sent from one computer to the other passes downward through all four layers, starting with the sending computer’s application layer and passing through the network interface layer. After the data reach the recipient host computer, they travel up the layers and are reassembled into a format the receiving computer can use. If the receiving computer finds a damaged packet, it asks the sending computer to retransmit it. This process is reversed when the receiving computer responds. Diff: 3 Page Ref: 251-252 AACSB: Analytic Skills

CASE: Analysis in terms of summarize Objective: 7.3

83) Describe and explain the idea of \Why or why not?

Answer: Network neutrality describes the current equal access by users to Internet bandwidth, regardless of the services they are using on the Internet. Network neutrality is the idea that Internet service providers must allow customers equal access to content and applications, regardless of the source or nature of the content. Presently, the Internet is indeed neutral: all Internet traffic is treated equally on a first-come, first-serve basis by Internet backbone owners. The Internet is neutral because it was built on phone lines, which are subject to \laws require phone companies to treat all calls and customers equally. For example, someone using the Internet to download large movie files pays the same rate as someone accessing their e-mail. Now telecommunications and cable companies want to be able to charge differentiated prices based on the amount of bandwidth consumed by content being delivered over the Internet. Student opinions will vary; one might be: I support network neutrality because the risk of censorship increases when network operators can selectively block or slow access to certain content. Diff: 2 Page Ref: 262-263 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.3

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84) You have been hired by a small new Web design firm to set up a network for its single office location. The network is primarily needed for exchanging files, accessing and managing beta Web sites on their Web server, and connecting to the Internet. The firm hires many freelancers who come into the office on an ad-hoc basis and it does not have a lot of money to spend on infrastructure. What type of network will you recommend?

Answer: Student answers will vary. An example answer is: I would recommend a mixed Ethernet and wireless network. The Ethernet LAN would connect the Web servers and primary

workstations and connect via cable service to the Internet. Freelancers could connect wirelessly via access points. Diff: 3 Page Ref: 153-254, 276-277 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.2

85) What are the business advantages of using voice over IP (VoIP) technology?

Answer: Business can lower costs by using the Internet to deliver voice information, avoiding the tolls charged by local and long-distance telephone networks. They can lower costs from not having to create a separate telephone network. VOIP enables communication by supporting Internet conference calls using video. VOIP also provides flexibility phones can be added or moved to different offices without rewiring or reconfiguring the network. Diff: 2 Page Ref: 264-265 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.3

86) How are RFID systems used in inventory control and supply chain management?

Answer: In inventory control and supply chain management, RFID systems capture and manage more detailed information about items in warehouses or in production than bar coding systems. If a large number of items are shipped together, RFID systems track each pallet, lot, or even unit item in the shipment. This technology may help companies improve receiving and storage operations by enhancing their ability to \shelves. Diff: 1 Page Ref: 280 AACSB: Analytic Skills

CASE: Analysis in terms of summarize Objective: 7.5

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87) What are wireless sensor networks? How do they work and what are they used for?

Answer: Wireless sensor networks (WSNs) are networks of interconnected wireless devices that are embedded into the physical environment to provide measurements of many points over large spaces. These devices have built-in processing, storage, and radio frequency sensors and antennas. They are linked into an interconnected network that routes the data they capture to a computer for analysis. These networks range from hundreds to thousands of nodes. Because wireless sensor devices are placed in the field for years at a time without any maintenance or human intervention, they must have very low power requirements and batteries capable of lasting for years. Wireless sensor networks are valuable in areas such as monitoring environmental changes; monitoring traffic or military activity; protecting property; efficiently operating and managing machinery and vehicles; establishing security perimeters; monitoring supply chain management; or detecting chemical, biological, or radiological material. Diff: 1 Page Ref: 281 AACSB: Analytic Skills

CASE: Analysis in terms of summarize Objective: 7.5

88) What is Web 3.0, and how do you think Web 3.0 developments could impact businesses? Answer: Web 3.0 is the vision of the next generation of the Web in which all of the information available on the Web is woven together into a single experience. The related movement called the Semantic Web is a collaborative effort to add a layer of meaning to existing information to reduce the amount of human time spent in searching and processing that information. Student views on the impact on businesses would vary. An example answer is: This potentially could have huge effects on businesses as simple analysis becomes mechanized, requiring fewer humans to perform this basic task. Diff: 2 Page Ref: 274-275 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.3

89) Blogs, wikis, and social networking sites were designed for individuals to communicate with each other. What uses do businesses have for these tools? Give specific examples.

Answer: Businesses can use these tools to reach out and market to potential new customers. For example, many businesses have Facebook sites to market their product to specific groups on Facebook. They can use these tools to support and give added value to existing customers. For example, a software company could have a blog that discusses in-depth use of a software product. Businesses can also use these tools within their company to communicate between departments and share knowledge. For example, a company wiki could be set up as a repository of expert information. Diff: 2 Page Ref: 273-274 AACSB: Analytic Skills

CASE: Synthesis in terms of build, model Objective: 7.3

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90) What has made the Google search engine so successful?

Answer: The Google search engine became so successful because it was one of the first search engines to incorporate page ranking: Not only does it index the Web pages it finds according to both keywords and combinations of keywords, it also ranks each page according to the number of pages that link to it, and the number of pages it links to itself. This helped make search results more relevant when compared to search engines relying solely on key words used on Web pages. A user could be relatively certain that they would find relevant information within the top results of a Google search. Improved search results for the user, along with continual improvements to its search engine, the development and other Web applications, tools, and its AdSense product where it sells keywords to the highest bidder has made Google so successful as a search engine and marketing firm. Diff: 2 Page Ref: 269-271 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.3

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Copyright ? 2012 Pearson Education, Inc.

90) What has made the Google search engine so successful?

Answer: The Google search engine became so successful because it was one of the first search engines to incorporate page ranking: Not only does it index the Web pages it finds according to both keywords and combinations of keywords, it also ranks each page according to the number of pages that link to it, and the number of pages it links to itself. This helped make search results more relevant when compared to search engines relying solely on key words used on Web pages. A user could be relatively certain that they would find relevant information within the top results of a Google search. Improved search results for the user, along with continual improvements to its search engine, the development and other Web applications, tools, and its AdSense product where it sells keywords to the highest bidder has made Google so successful as a search engine and marketing firm. Diff: 2 Page Ref: 269-271 AACSB: Analytic Skills

CASE: Evaluation in terms of assess Objective: 7.3

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Copyright ? 2012 Pearson Education, Inc.

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