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65 Cards in this Set
- Front
- Back
Which of the following best describes DSL connections?
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Answer: transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user |
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Which of the following has the fastest maximum transfer transmission rate?
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Answer: UWB |
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On a network such as the one illustrated in the accompanying figure, some servers perform a specific task and can be placed w/ other servers to perform multiple tasks. What are these kind of servers called?
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Answer: dedicated |
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Which of the following kinds of modems is a modem that sends and receives digital data over and information to and from a digital line?
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Answer: broadband |
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Which of the following is true of DSL?
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Answer: It is a popular digital line alternative for the small business or home user. |
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Which of the following is a transmission media on which data, instructions, or information travel?
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Answer: communications channel |
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Your school computer library has a network that connects computers and devices within a few small rooms. What type of network does it likely use?
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Answer: LAN (local area network) |
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Which of the following technologies is your new mobile phone payment device most likely to use?
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Answer: NFC |
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Which of the following terms is the time it takes a signal to travel from one location to another on a network?
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Answer: latency |
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Which network type connects each computer and device to a central device?
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Answer: a star network |
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Which of the following is a central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network?
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Answer: wireless access point |
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You are purchasing a new mobile phone, and are learning about categories of cellular transmissions. You ask the sales person what the ‘G’ stands for in the categories 1G, 2G, 3G, and 4G. What does he reply?
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Answer: generation |
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Network servers and web servers are examples of what type of server?
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Answer: dedicated servers |
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Which of the following statements best describes the Ethernet network standard?
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Answer: no central computer or device on the network should control when data can be transmitted |
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As shown in the accompanying figure, what is the term for a network that covers a large geographic area, such as a city, country, or the world, using a variety of wired and wireless transmission media?
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Answer: wide area network (WAN) |
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You run a large network in which it is important to keep a duplicate of the central devices in case the primary one fails. What category of network topology does this network use?
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Answer: star network |
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Which of the following is the maximum transfer transmission rate for communications satellites?
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Answer: 2.56 Tbps |
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Which of the following did Sven Mattisson and Jaap Haartsen invent?
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Answer: Bluetooth |
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What term is used to describe the time it takes a signal to travel from one location to another on a network?
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Answer: latency |
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What term describes the process in which two or more computers or devices transfer data, instructions, and information?
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Answer: digital communication |
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Which of the following is a LAN that uses no physical wires?
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Answer: WLAN (wireless local area network) |
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Which statement best describes how the RFID standard works? Two connected network devices use infrared light to create a direct frequency.
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Answer: The network uses radio signals to communicate with a tag placed in or attached to an object, animal, or person. |
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What is a sending device?
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Answer: a device that initiates an instruction to transmit data, instructions, or information |
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Which of the following is a 4G standard?
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Answer: LTE |
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Which of the following has the fastest transfer rate?
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Answer: ATM |
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Which of the following statements best describes the Ethernet network standard?
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Answer: no central computer or device on the network should control when data can be transmitted. |
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Which of the following is a simple, inexpensive network that typically connects fewer than 10 computers?
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Answer: peer-to-peer network |
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Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?
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Answer: microwave station |
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Which of the following kinds of devices is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device?
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Answer: communications devices |
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Which of the following terms identifies any network based on the 802.11 family of standards?
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Answer: IEEE |
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Which of the following is true of the installation of a network like the one shown in the accompanying figure?
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Answer: It must have built-in wireless capability or the appropriate wireless network card, USB adapter, or other wireless device |
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What is the approximate distance most Bluetooth devices can be from each other to communicate, without using additional equipment?
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Answer: 33 feet |
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How many wired and/or wireless computers and mobile devices might a router be able to connect?
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Answer: more than 200 |
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Which is the best description of a coaxial cable?
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Answer: a single copper wire surrounded by at least three layers |
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Which of the following technologies is your new remote control most likely to use?
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Answer: IrDA |
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Which of the following can detect problems—such as why traffic is flowing slowly—on networks that use the TCP/IP protocol?
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Answer: packet sniffer software |
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Which of the following best describes DSL connections?
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Answer: transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user |
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Which of the following is the least likely technology PANs would use?
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Answer: peer-to-peer |
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Which of the following has a port to which a cable connects in order to coordinate the transmission and receipt of data, instructions, and information to and from the computer or device containing it?
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Answer: network interface card |
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Which of the following has the fastest transfer rate?
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Answer: FTTP |
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Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.
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Answer: networks |
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Which of the following is true of DSL?
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Answer: It is a popular digital line alternative for the small business or home user. |
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Who invented the Ethernet?
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Answer: Robert Metcalfe |
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Which of the following offers an alternative to infrared communications with high bandwidth transmissions?
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Answer: Bluetooth |
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Which of the following statements is not true of Wi-Fi?
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Answer: Even if two products are Wi-Fi Certified, they must share the same platform in order to communicate. |
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Contactless payment uses this technology. |
Answer: NFC |
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Transmission media that uses wire, cable, and other tangible materials to send communications signals. |
Answer: Physical |
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Standard that specifies how wireless devices communicate over the air in a wide area. |
Answer: WiMAX |
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Kind of network that is sometimes called a file sharing network. |
Answer: P2P |
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Transmission media that sends communications signals through the air or space using radio, microwave, and infrared signals. |
Answer: Wireless |
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Consists of a single copper wire surrounded by at least three layers. |
Answer: Coaxial |
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A network standard that specifies how two devices use short-range radio waves to communicate at high speeds with each other. |
Answer: UWB |
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Kind of cable designed to reduce noise. |
Answer: twisted pair |
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This kind of device contains a small chip that allows it to communicate with other similar devices. |
Answer: Bluetooth |
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Mobile computers and devices, such as a mouse, printer, and smartphone, often have this kind of port to enable the transfer of data from one device to another using light waves. |
Answer: infrared |
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A wireless transmission medium that distributes radio signals through the air over long distances. |
Answer: broadcast radio |
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Type of lines that can be either analog or digital. |
Answer: dedicated lines |
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Protocol that defines how a network uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person. |
Answer: RFID |
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A form of broadcast radio that is used widely for mobile communications. |
Answer: cellular radio |
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To prevent unauthorized users from accessing files and computers, many routers are protected by these. |
Answer: firewall |
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Category of cellular transmission that transmits digital data at speeds from 9.6 Kbps to 144 Kbps. |
Answer: 2G |
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Examples of standards in this category include EDGE and UMTS. |
Answer: 3G |
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Can be negatively affected by the distance between two points, the type of transmission media, and the number of nodes through which data must travel. |
Answer: latency |
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The core of this kind of cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals. |
Answer: fiber optic |
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Category of cellular transmission that transmits digital data at speeds up to 100 Mbps. |
Answer: 4G |