Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?
About which of the following do privacy advocates worry can destroy a person’s anonymity?
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?
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?
Which of the following statements is not true of peer-to-peer networks?
-Each computer has equal responsibilities and capabilities.
-Each computer stores files on its own storage device.
-They are simple, inexpensive networks that typically connect fewer than 10 computers.
-The network operating system is stored on a network server
The network operating system is stored on a network server
The design of computers, devices, and media in a network is categorized as either client/server or peer-to-peer. What is the term used to refer to this characterization?
What is another term for an Internet peer-to-peer network?
-a file sharing network
-a client/server network
-an interconnected webwork
a file sharing network
On a network such as the one illustrated in the accompanying figure, if one node fails, as long as that node is not providing services to other nodes on the network, what happens?
-only that node is affected
-only the nodes before that node are affected
-only the nodes after that node are affected
-all the nodes are affected
only that node is affected
Which of the following technologies is the new tollbooth on the local highway most likely to use?
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?
-wireless access point
wireless access point
In reference to computer communications, what does the term noise mean?
-voice transmissions that include static
-the busy signal that indicates the network is busy
Which of the following can detect problems—such as why traffic is flowing slowly—on networks that use the TCP/IP protocol?
-packet sniffer software
-torrent flow apps
-bit monitoring scripts
packet sniffer software
Which of the following is the least likely technology PANs would use?
-special USB cables
Which statement best describes how the RFID standard works?
-The network uses reference devices instead of actual devices to speed up the transmission process.
-The network uses radio signals to communicate with a tag placed in or attached to an object, animal, or person.
-A node on a network must have an individual ID code that can communicate with other ready devices.
-Two connected network devices use infrared light to create a direct frequency.
The network uses radio signals to communicate with a tag placed in or attached to an object, animal, or person.
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?
Which of the following is not an application of communications satellite technology?
Which of the following can be avoided if a computer or mobile device has a motherboard that integrates networking capability?
You are a technology expert and you have been asked to predict which technology will become the Internet standard for data transmission, replacing T3 lines. Which of the following are you most likely to predict?
Which of the following kinds of cable consists of a single copper wire surrounded by at least three layers: an insulating material, a woven or braided metal, and a plastic outer coating?
Which is the best description of a coaxial cable?
-a cohesive cable connected at axis points
-dozens or hundreds of thin strands of glass or plastic that use light to transmit signals
-one or more pairs of copper wires bundled together
-a single copper wire surrounded by at least three layers
a single copper wire surrounded by at least three layers
What is the purpose of hubs and switches?
-to minimize the number of dropped network connections in your home
-to translate analog signals into digital signals
-to give a location for each node on a network
-to provide a central point for cables in a network
to provide a central point for cables in a network
Which of the following enables a computer or device that does not have built-in networking capability to access a network?
Digital communications describes a process in which two or more computers or devices transfer all of the following EXCEPT ____.
Which of the following communications technologies does not use broadcast radio signals?
Which of the following is a communications device that connects multiple computers together and transmits data to its correct destination on a network?
Many home users are connecting multiple computers and devices together into a system. What is the name for this system?
What is a receiving device?
-a device that initiates an instruction to transmit data, instructions, or information
-a device on which data, instructions, and information travel
-a device that connects to a communications channel
-a device that accepts the transmission of data, instructions, or information
a device that accepts the transmission of data, instructions, or information
Which of the following is not true of communications software?
-Some communications devices require separate communications software to ensure proper data transmission.
-Communications software works with network standards and protocols to ensure data moves through the network or Internet correctly.
-Communications software can help users establish a connection to another computer, mobile device, or network.
-Email, FTP, and VoIP are examples of system software for communications.
Email, FTP, and VoIP are examples of system software for communications.
Which of the following best describes DSL connections?
-uses fiber-optic cable to provide extremely high-speed Internet access to a user’s physical, permanent location
-transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user
-a service that carries voice, data, video, and multimedia at a high speed; used by telephone networks and the Internet
-uses long-distance digital telephone lines to carry multiple signals over a single line; only medium to large companies can afford them
transmits at fast speeds on existing standard copper telephone wiring; popular for small business or home user
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?
-network interface card
network interface card