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Exam 10: Communications and Networks

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Question 51

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In a fiber-optic cable, each strand, called an optical fiber, is as thin as a human hair.

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Question 52

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COGNITIVE ASSESSMENT Your new smartphone has a port that enables the transfer of data from one device to another using infrared light waves. What kind of port is this?

A) Bluetooth
B) Wi-Fi
C) IrDA
D) UWB

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Question 53

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Data, instructions, and information travel along transmission media in either analog or digital form, depending on the transmission media.

COGNITIVE ASSESSMENT What is the term used to connect a device to a network that has an IP address?

Which of the following has the fastest transfer rate?

On what kind of network, such as that illustrated in the accompanying figure, do one or more computers act as a server and the other computers on the network request services from the server?

COGNITIVE ASSESSMENT What term is used to describe the time it takes a signal to travel from one location to another on a network?

Which of the following defines guidelines that specify the way computers access the medium to which they are attached, the type(s) of medium used, the speeds used on different types of networks, and the type(s) of physical cable and/or the wireless technology used?

Which of the following defines how a network uses close-range radio signals to communicate between two devices or objects equipped with this technology?

Which of the following terms is an electrical disturbance that can degrade communications?

Wi-Fi networks easily can be integrated with wired Ethernet networks.

COGNITIVE ASSESSMENT Which of the following best describes DSL connections?

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?

A star network consists of a single central cable, to which all computers and other devices connect.

With ISDN, the same telephone line that could carry only one computer signal now can carry three or more signals at once through the same line, using a technique called multiplexing.

COGNITIVE ASSESSMENT 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?

COGNITIVE ASSESSMENT Network servers and web servers are examples of what type of server?

Each token ring network has several tokens.

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?

A(n) ____________________ is a network that connects computers and devices in an individual's workspace using wired and wireless technology.