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7 2020, questions and answers
Projects management (IS221)
Assiut University
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Management Information Systems: Managing the Digital Firm, 15e(Laudon) Chapter 7 - Telecommunications, the Internet, and Wireless Technology
Which of the following is a device that acts as a connection point between computers and can filter and forward data to a specified destination? A) Hub B) Switch C) Router D) NIC E) Modem
The Internet is based on which three key technologies? 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 E) E-mail, instant messaging, and newsgroups
Which of the following involves slicing digital messages into parcels, transmitting them along different communication paths, and reassembling them at their destinations? A) Multiplexing B) Packet shifting C) Packet routing D) ATM E) Packet switching
The telephone system is an example of a ________ network. A) peer-to-peer B) wireless C) packet-switched D) circuit-switched E) client/server
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. E) Packets are reassembled into the original message when they reach their destinations.
In TCP/IP, IP is responsible for which of the following? A) Disassembling and reassembling packets during transmission B) Establishing an Internet connection between two computers C) Moving packets over the network D) Sequencing the transfer of packets E) Breaking messages down into packets
Which of the following is the best description of a protocol in a telecommunications network architecture? 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 E) A pathway through which packets are routed
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 E) Software, Hardware, Network Interface, Internet
On which of the following protocols is the Internet based? A) TCP/IP B) FTP C) IMAP D) HTTP E) DNS
A(n) ________ is a device that forwards packets of data through different networks, ensuring that the data gets to the right address. A) modem B) router C) packet D) telnet E) hub
Computer networks are fundamentally different from telephone networks. (TRUE)
A NOS must reside on a dedicated server computer in order to manage a network. (FALSE)
A hub is a networking device that is used to filter and forward data to specified destinations on the network. (FALSE)
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. (TRUE)
A computer network consists of at least three computers. (FALSE)
Central large mainframe computing has largely replaced client/server computing. (FALSE)
Circuit switching makes much more efficient use of the communications capacity of a network than does packet switching. (FALSE)
Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms. (TRUE)
In a large company today, you will often find an infrastructure that includes hundreds of small LANs linked to each other as well as to corporate-wide networks. (TRUE)
TCP/IP was developed during the early 1970s to support efforts to help scientists transmit data among different types of computers over long distances. (TRUE)
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,
B) LAN
C) WAN
D) MAN
E) SAN
Which type of network treats all processors equally and allows peripheral devices to be shared without going to a separate server? A) MAN B) Wireless C) LAN D) Windows domain network E) Peer-to-peer
Which type of network would be most appropriate for a business comprised of three employees and a manager located in the same office space, whose primary need is to share documents? A) MAN B) Domain-based LAN C) Peer-to-peer network D) WAN E) SAN
A network that spans a city, and sometimes its major suburbs, as well, is called a: A) CAN. B) MAN. C) LAN. D) WAN. E) WSN.
A network that covers entire geographical regions is most commonly referred to as a(n): A) local area network. B) intranet. C) peer-to-peer network. D) wide area network. E) metropolitan area network.
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. E) geographical distance spanned by a network.
The total amount of digital information that can be transmitted through any telecommunications medium is measured in: A) bps. B) Hertz. C) baud. D) gigaflops. E) RPMs.
A(n) ________ signal is a discrete, binary waveform that transmits data coded into two discrete states such as 1-bits and 0-bits. A) modulated
B) broadband C) T D) analog E) digital
Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire. (TRUE)
Fiber-optic cable is more expensive and harder to install than wire media. (TRUE)
The number of cycles per second that can be sent through any telecommunications medium is measured in kilobytes. (FALSE)
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 websites 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: I would recommend a mixed wired and wireless network. The wired LAN would connect the web servers and primary workstations and connect via cable service to the Internet. Freelancers could connect wirelessly via access points.
What are the two types of signals used to communicate a message in a network and how are they different? What device converts one type to the other type? ANSWER: The two ways to communicate a message in a network are analog signals and digital signals. An analog signal is represented by a continuous waveform that passes through a communications medium and is used for voice communication. Examples include the telephone handset and other types of speakers that generate analog sound. On the other hand, digital signals are binary waveforms (not continuous) that communicate information as strings of two discrete states: one bit or zero bits (often depicted as strings of zeroes and ones). Computers use these types of signals and use modems to convert digital signals to analog signals.
What are some of the common types of physical transmission media and what differentiates them from one another? ANSWER: Common types of physical transmission media include twisted pair wire, coaxial cable, fiber-optic cable, and wireless transmission media. Twisted pair wire consists of strands of copper wire twisted in pairs for voice and data communications. Coaxial cable consists of thickly insulated copper wires capable of high-speed data transmission and resistance to interference. Fiber-optic cable consists of strands of clear glass fiber that transmit data as pulses of light generated by lasers. Wireless transmission media is based on radio signals and involves satellite microwave systems and cellular networks
Which of the following is not one of the top five search engines? A) Facebook B) Yahoo C) Microsoft Bing D) Ask E) Google
Digital subscriber lines: A) operate over existing telephone lines to carry voice, data, and video. B) operate over coaxial cable 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.
C) e-mail D) wireless E) network
________ integrate disparate channels for voice communications, data communications, instant messaging, e- mail, and electronic conferencing into a single experience. A) Wireless networks B) Intranets C) Virtual private networks D) Modems E) Unified communications
A VPN: 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. E) is a proprietary networking service technology developed by individual corporations.
Web browser software requests web pages from the Internet using which of the following protocols? A) URL B) HTTP C) DNS D) HTML E) FTP
Together, a protocol prefix, a domain name, a directory path, and a document name, are called a(n): A) uniform resource locator. B) IP address. C) third-level domain. D) root domain. E) child domain.
The most common web server today is: A) Microsoft IIS. B) WebSTAR. C) IBM HTTP Server. D) Netscape Server. E) Apache HTTP Server.
Which of the following pulls content from websites and feeds it automatically to a user's computers? A) FTP B) RSS C) HTTP D) Bluetooth E) IPv
Which of the following can be used to help a website achieve a higher ranking with the major search engines? A) VPN B) IAB C) SEM D) SEO E) RSS
Which of the following statements is not true about search engines? A) They are arguably the Internet's "killer app." 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. E) Users are increasingly using search engines on mobile devices.
Which process is used to protect transmitted data in a VPN? A) Tunneling B) PPP C) VOIP D) Packet-switching E) Chaining
________ monetizes the value of the data stored by search engines. A) TCP/IP B) RSS C) WiMax D) IoT E) Search Engine Marketing
Shopping bots use ________ software for searching the Internet. A) Web 2. B) Web 3. C) intelligent agent D) comparison E) SEO
Which of the following is not a defining feature of Web 2? A) Interactivity B) Real-time user control C) Semantic search D) Social participation (sharing) E) User-generated content
A(n) ________ is a commercial organization with a permanent connection to the Internet that sells temporary connections to retail subscribers. A) RSS B) WAN C) NFP D) ISP E) FTP
The backbone networks of the Internet are typically owned by long-distance telephone companies called: A) regional network providers. B) enhanced service providers. C) internet bulk providers. D) backbone providers. E) network service providers.
A(n) ________ is software for locating and managing stored web pages. A) web server B) net server
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.
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 Ad Sense product where it sells keywords to the highest bidder has made Google so successful as a search engine and marketing firm.
Explain the Domain Name System. What are some of the common domain name extensions currently available and what types of services do they designate? ANSWER: The Domain Name System (DNS) converts domain names to IP addresses. Domain names are the English-like names that correspond to the unique 32-bit numeric IP address for each computer connected to the Internet. DNS is a hierarchy, with the root domain at the top, top-level domains such as .com and .edu one level below, and second-level domains designate a top level name and a second level name, like amazon. Common domain name extensions include .edu (educational institutions), .gov (government agencies), .mil (military), .net (network computers), .org (nonprofit organizations and foundations), .biz (business firms), and .info (information providers). Additionally, countries have their own domain names. Answers may cite a variety of other domain name extensions.
All of the following are physical components of an RFID system except: A) bar codes. B) antennas. C) radio transmitters. D) tags. E) a stationary or handheld device.
Which digital cellular standard is used widely throughout the world except the United States? A) GSM B) CDMA C) WLAN D) LTD E) 4G
The concept of a future web in which it is commonplace for everyday objects to be connected, controlled or monitored over the Internet is called: A) the Internet of Things. B) the Semantic Web. C) Internet2.
D) a 3-D Web. E) Web 2.
Which of the following statements about RFID is not true? A) RFIDs transmit only over a short range. B) RFIDs use an antenna to transmit data. C) Microchips embedded in RFIDs are used to store data. D) RFIDs require line-of-sight contact to be read. E) RFID tags and antennas come in a variety of shapes and sizes.
Which of the following is the first generation of cellular systems suitable for watching videos? A) 2G B) 2 C) 3G D) 3 E) 4G
4G networks use which of the following standards? A) GSM and LTD B) CDMA and PAN C) LTE and LTD D) T-Mobile and AT&T E) LTE and WiMax
The most appropriate wireless networking standard for creating PANs is: A) I-mode. B) IEEE 802. C) Wi-Fi. D) Bluetooth. E) RFID.
Bluetooth can be used to link up to ________ devices within a 10-meter area using low-power, radio-based communication. A) two B) five C) eight D) fifteen E) twenty
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: A) touch points. B) netcenters. C) hot points. D) wireless hubs. E) hotspots.
The 802 set of standards is known as: A) WLAN. B) WSN. C) Wi-Fi. D) WiMax. E) WAN.
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.
- What are some of the standards and networks used in digital cellular service, and where are they in use? ANSWER: Common cellular system standards include the Global System for Mobile Communications (GSM), which is used in Europe and much of the world outside of the United States. In the U., Code Division Multiple Access is used by Verizon and Sprint. It is a more efficient system than GSM. The generations of networks in use today by cellular systems includes 3G and 4G. 4G networks offer higher speeds than 3G. The standards in use by 4G Networks are Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMax).
7 2020, questions and answers
Course: Projects management (IS221)
University: Assiut University
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