Flashcards and Answers – Chapter 8
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LTE stands for _______.
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Long Term Evolution
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In a computer network, this node that requests and uses resources available from other nodes.
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Client
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In a communication system, which among the following convert messages into packets that can travel across the communication channel?
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Connection devices
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Cellular services use _______ to provide wireless connectivity to the Internet.
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3G and 4G cellular networks
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All communications between a company's internal networks and the outside world pass through this server.
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Proxy
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The GPS device in an automobile uses which communication channel?
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Satellite
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Network operating systems (NOS) control and coordinate the activities of all computers and other devices on a network.
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True
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A firewall is a specialized technology designed to protect an organization's network against external threats.
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True
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A network gateway can be used to connect the LAN of one office group to the LAN of another office group.
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True
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In a peer-to-peer network, only the central host computer supplies the resources, the other computers request resources from this host.
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False
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This type of network topology does not use a specific physical layout.
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Mesh
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Organizations use the following to allow suppliers and others limited access to their networks.
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Extranets
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Telephone lines use coaxial cables.
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False
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This type of network strategy uses central servers to coordinate and supply services to other nodes on the network.
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Client/server
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The capacity of a communication channel is measured in _______.
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bandwidth
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Remote users can connect to an organization's network through this type of secure private connection.
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VPN
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Packetization refers to breaking information into small parts.
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True
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Network architecture describes how a computer network is configured and what topologies and strategies are employed.
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True
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TCP/IP protocol involves identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.
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True
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One of the most dramatic changes in connectivity and communications in the past few years has been _______.
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widespread use of mobile devices with wireless Internet connectivity
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Using this type of communications channel, several users can simultaneously use a single connection for high-speed data transfer.
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Broadband
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Modulation is the name of the process of converting from digital to analog.
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True
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Intrusion detection systems can recognize signs of a network attack and disable access before an intruder can do damage.
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True
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The most common standard in LANs is called Ethernet.
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True
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Fiber-optic cable transmits data as pulses of light through tiny tubes of glass.
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True
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WANs are widely used by organizations to link personal computers and to share printers and other resources.
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False
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Every computer on the Internet has a unique numeric address called a(n) _______.
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IP address
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WiMax stands for _______.
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Worldwide Interoperability for Microwave Access
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The essential features of this include identifying, sending, and receiving devices and breaking information into small parts for transmission across the Internet.
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TCP/IP
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A wireless access point that provides Internet access in a public place such as a coffee shop, library, bookstore, or university.
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Hotspot
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Which physical connection is the fastest?
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Fiber-optic cable
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In a network environment, a client provides resources for the servers.
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VPN
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With respect to peer-to-peer network, there is an abundant amount of powerful management software that monitors the network activities.
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False
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In a communication system, which among the following originate and accept messages in the form of data, information, and/or instructions?
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Sending and receiving devices
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A service that uses existing phone lines to provide high-speed connections is called _______.
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DSL
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Connection devices are the actual connecting or transmission medium that carries the message.
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False
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A MAN is a network that is frequently used as links between office buildings that are located throughout a city.
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True
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The _______ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes.
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Switch
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This device enables connectivity between two LANS or a LAN and a larger network.
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Network gateway
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Which among the following is considered a line-of-sight communication medium?
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Microwave
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A prototype is a set of communication rules for the exchange of information.
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false
