Exam 9: Communications and Networks

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Identify the letter of the choice that best matches the phrase or definition.
Category of cellular transmission that transmits digital data at speeds up to 15 Mbps.
online meeting
Transmission media that sends communications signals through the air or space using radio, microwave, and infrared signals.
dedicated
A form of broadcast radio that is used widely for mobile communications.
adapter card
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Category of cellular transmission that transmits digital data at speeds up to 15 Mbps.
online meeting
Transmission media that sends communications signals through the air or space using radio, microwave, and infrared signals.
dedicated
A form of broadcast radio that is used widely for mobile communications.
adapter card
Type of lines that can be either analog or digital.
4G
Kind of network that is sometimes called a file sharing network.
broadcast radio
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.
P2P
Mobile computers and devices, such as a mouse, printer, and smart phone, often have this kind of port to enable the transfer of data from one device to another using light waves.
latency
Examples of standards in this category include GSM and UMTS.
hot spots
A wireless transmission medium that distributes radio signals through the air over long distances.
infrared
Category of cellular transmission that transmits digital data at speeds from 9.6 Kbps to 19.2 Kbps.
fiber-optic
This kind of device contains a small chip that allows it to communicate with other similar devices.
2G
Kind of cable designed to reduce noise.
twisted-pair
Instead of these, some users access the Internet through mobile wireless networks.
coaxial
Allows participants to have the ability to open a separate window and type messages to one another.
wireless
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.
cellular radio
Transmission media that uses wire, cable, and other tangible materials to send communications signals.
3G
Consists of a single copper wire surrounded by at least three layers.
UWB
To prevent unauthorized users from accessing files and computers, many routers are protected by these.
Bluetooth
A network standard that specifies how two devices use short-range radio waves to communicate at high speeds with each other.
firewalls
A dial-up modem usually is in this form, which is inserted in an expansion slot on a computer's motherboard.
physical
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COGNITIVE ASSESSMENT What is a receiving device?

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Whereas a standard dial-up telephone line uses multiplexing so that multiple signals share the same line, digital T-carrier lines carry only one signal.

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Which of the following is true of DSL?

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____________________ is a network technology that defines how messages are routed from one end of a network to the other, ensuring the data arrives correctly by dividing it into packets.

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COGNITIVE ASSESSMENT Which is the best description of a coaxial cable?

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In a networked environment, no authorized computer user can access data and information stored on other computers on the network.

(True/False)
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COGNITIVE ASSESSMENT What is the term for a small version of the Internet that exists within an organization for such purposes as project management and group scheduling?

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Infrared (IR) is a wireless transmission medium that sends signals using infrared light waves.

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On a client/server network, the client sometimes is called a host computer.

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COGNITIVE ASSESSMENT What is the approximate distance most Bluetooth devices can be from each other to communicate, without using additional equipment?

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COGNITIVE ASSESSMENT Which of the following is not an example of a dedicated line?

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A(n) ____________________ is a legal agreement that permits users to install software on multiple computers, usually at a volume discount.

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Web services require a specific programming language, operating system, and Web browser.

(True/False)
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Discuss what an intranet is, and include a definition of an extranet.

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Which of the following allows users to send graphics, pictures, video clips, and sound files, as well as short text messages to another smart phone or mobile device?

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Most groupware provides personal information manager (PIM) functions.

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A(n) ____________________ is a network that connects computers and devices in a limited geographical area, such as a home, school computer laboratory, or office building.

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COGNITIVE ASSESSMENT 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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COGNITIVE ASSESSMENT Which of the following best describes DSL connections?

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