IS 3003 Chapter 7 – Flashcards
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Increasingly, voice, video, and data communications are all mostly based on Internet technology.
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Answer: TRUE Diff: 1 Page Ref: 222 Internet technology, in this case, refers to the use of 'packet switching'. Earlier, communications were largely based on 'circuit switching'. You should know the difference between packet and circuit switching
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An network operating system (NOS) must reside on a dedicated server computer in order to manage a network.
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Answer: FALSE Diff: 2 Page Ref: 223 Can reside on every computer in the network, or, on a dedicated server.
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A hub is a networking device that connects network components and is used to filter and forward data to specified destinations on the network.
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Answer: FALSE Diff: 2 Page Ref: 223 A switch is the networking device that connects ... So what does a hub do?
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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.
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Answer: TRUE Diff: 2 Page Ref: 224
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Central large mainframe computing has largely replaced client/server computing.
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Answer: FALSE Diff: 2 Page Ref: 224 No - client server computing has replaced central large mainframe computing.
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Circuit switching makes much more efficient use of the communications capacity of a network than does packet switching.
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Answer: FALSE Diff: 1 Page Ref: 224
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Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms.
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Answer: TRUE Diff: 1 Page Ref: 226
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Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire.
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Answer: TRUE Diff: 2 Page Ref: 229
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The number of cycles per second that can be sent through any telecommunications medium is measured in kilobytes.
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Answer: FALSE Diff: 2 Page Ref: 228 It is usually measured in hertz ( or KHz or MHz). One hertz is one cycle/sec.
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The Domain Name System (DNS) converts domain names to IP addresses.
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Answer: TRUE Diff: 3 Page Ref: 230
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VoIP technology delivers voice information in digital form using packet switching.
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Answer: TRUE Diff: 1 Page Ref: 235
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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
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Answer: TRUE Diff: 1 Page Ref: 223
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Radio Frequency Identification (RFID) technology is being gradually replaced by less costly technologies such as Wireless Sensor Networks (WSNs).
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Answer: FALSE Diff: 2 Page Ref: 250 Each serves a different purpose.
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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.
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Answer: B Diff: 1 Page Ref: 223
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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.
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Answer: B Diff: 1 Page Ref: 224
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The telephone system is an example of a ________ network. A) peer-to-peer B) wireless C) packet-switched D) circuit-switched
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Answer: D Diff: 1 Page Ref: 224
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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.
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Answer: C Diff: 2 Page Ref: 225
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In TCP/IP, IP is responsible for: A) disassembling and reassembling of packets during transmission. B) establishing an Internet connection between two computers. C) moving packets over the network. D) sequencing the transfer of packets.
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Answer: A Diff: 3 Page Ref: 225
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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.
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Answer: B
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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
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Answer: C Diff: 3 Page Ref: 225-226 AACSB: Information technology CASE: Comprehension Learning Objective: 1 - What are the principal components of telecommunications networks and key networking technologies?
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Which signal types are represented by a continuous waveform? A) Laser B) Optical C) Digital D) Analog
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Answer: D Diff: 2 Page Ref: 226 AACSB: Information technology CASE: Comprehension Learning Objective: 2 - What are the different types of networks?
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To use the analog telephone system for sending digital data, you must also use: A) a modem. B) a router. C) DSL. D) twisted wire.
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Answer: A Diff: 1 Page Ref: 226
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The "Internet of Things" refers to: A) the increasing focus on shopping as the major user activity on the Internet. B) the microblogging trend, in which users exchange short text and pictures rather than longer and more in-depth content and text. C) a vision of a pervasive Web, in which common objects are connected to and controlled over the Internet. D) the trend away from platform-independent Web applications to mobile-device specific apps.
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Answer: C Diff: 3 Page Ref: 245
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Which of the following is a challenge faced by Wi-Fi networks? A) Lack of broadband support B) Connectivity issues with wired LANs C) Susceptibility to interference from nearby wireless systems D) High cost of infrastructure technology
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Answer: C Diff: 2 Page Ref: 247-248
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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.
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Answer: C Diff: 2 Page Ref: 228
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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.
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Answer: A Diff: 2 Page Ref: 228 AACSB: Information technology CASE: Comprehension Learning Objective: 2 - What are the different types of networks?
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Digital subscriber lines: 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.
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Answer: A Diff: 2 Page Ref: 229
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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. D) have up to twenty-four 64-Kbps channels.
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Answer: C Diff: 2 Page Ref: 229
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Which protocol is the Internet based on? A) TCP/IP B) FTP C) packet-switching D) HTTP
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Answer: A Diff: 1 Page Ref: 229
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What service converts IP addresses into more recognizable alphanumeric names? A) HTML B) DNS C) IP D) HTTP
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Answer: B Diff: 2 Page Ref: 230
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The child domain of the root is the: A) top-level domain. B) second-level domain. C) host name. D) domain extension.
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Answer: A Diff: 2 Page Ref: 230
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n the domain name "http://myspace.blogging.com", what are the root, top-level, second-level, and third-level domains, respectively? A) "http://", myspace, blogging, com B) "http://", com, blogging, myspace C) ".", com, blogging, myspace D) ".", myspace, blogging, com
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Answer: C Diff: 2 Page Ref: 230
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IPv6 is being developed in order to: A) update the packet transmission protocols for higher bandwidth. B) create more IP addresses. C) allow for different levels of service. D) support Internet2.
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Answer: B Diff: 2 Page Ref: 233 We currently use IPv4. (internet protocol version 4)
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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.
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Answer: D Diff: 2 Page Ref: 249
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A VPN: A) is an encrypted private network configured within a public network. B) is more expensive than a dedicated network. (is less expensive because it uses the internet for most of the transmission, and the internet is free) C) provides secure, encrypted communications using Telnet. (does not use Telnet. Telnet is old technology. It was used to connect dumb terminals to remote computers over the telephone network. It is a protocol that is supported by TCP, but I don't think it is in much use these days). D) is an Internet-based service for delivering voice communications. (for all communications)
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Answer: A Diff: 2 Page Ref: 238
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Web browser software requests Web pages from the Internet using which protocol? A) URL B) HTTP C) DNS D) HTML
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Answer: B Diff: 2 Page Ref: 238
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Together, a protocol prefix, a domain name, a directory path, and a document name, are called a(n): A) uniform resource locator (URL). B) IP address. C) third level domain. D) root domain.
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Answer: A Diff: 2 Page Ref: 239
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The process of employing techniques to help a Web site achieve a higher ranking with the major search engines is called: A) virtual private network (VPN) B) Internet Architecture Board (IAB). C) Search Engine Marketing (SEM.) D) Search Engine Optimization (SEO.)
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Answer: D Diff: 1 Page Ref: 241
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The most appropriate wireless networking standard for creating PANs is: A) I-mode. (don't know what this is) B) IEEE 802.11b. (standard for wireless networks) C) WiFi. (for wireless networks) D) Bluetooth.
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Answer: D Diff: 2 Page Ref: 246
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Bluetooth can be used to link up to ________ devices within a 10-meter area using low-power, radio-based communication. A) four B) six C) eight D) ten
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Answer: C Diff: 3 Page Ref: 246
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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) hotspots. C) hot points. D) wireless hubs.
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Answer: B Diff: 2 Page Ref: 247
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The 802.11 set of standards is known as: A) WLAN. B) WSN. C) Wi-Fi. D) WiMax.
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Answer: C Diff: 2 Page Ref: 247
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The WiMax standard can transmit up to a distance of approximately: A) 30 meters. (WiFi is 30-50 meters) B) 500 meters. C) 30 miles. D) 5 miles.
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Answer: C Diff: 3 Page Ref: 248
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What is the primary difference between 3G and 4G cellular systems? A) 4G systems are digital. B) 4G systems have greater transmission speeds. C) 3G systems are unable to handle Web browsing. D) 3G systems have poor security.
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Answer: B Diff: 2 Page Ref: 246 AACSB: Information technology
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A ________ is special software that routes and manages communications on the network and coordinates networks resources. A) switch B) firewall C) server D) network operating system/NOS
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Answer: D Diff: 2 Page Ref: 223
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A router is a device that forwards packets of data through different networks, ensuring that the data gets to the right address.
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Answer: TRUE Diff: 2 Page Ref: 223
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Prior to the development of ________, computer networks used leased, dedicated telephone circuits to communicate with other computers in remote locations. A) packet switching B) routers C) servers D) coaxial cable
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Answer: A Diff: 2 Page Ref: 224
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An analog signal is a discrete, binary waveform that transmits data coded into two discrete states such as 1-bits and 0-bits.
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Answer: FALSE Diff: 2 Page Ref: 226 This is the description of a digital signal.
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In Europe, and much of the world, the standard for cellular services is: A) GSM. B) LTE. C) Wi-Max. D) CDMA.
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Answer: A Diff: 2 Page Ref: 246
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An ISP is a commercial organization that owns a region of transcontinental high-speed backbone networks carrying the bulk of Internet traffic.
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Answer: FALSE Diff: 2 Page Ref: 228 So what is an ISP? And what organization owns a region of ...?
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The trunk lines of the Internet are typically owned by network service providers.
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Answer: TRUE Diff: 2 Page Ref: 231
