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Exam 9: Communications and Networks

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Question 81

Multiple Choice

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Each networked computer in a house can ____.

A) share a single high-speed Internet connection
B) access files and programs on other computers in the house
C) share peripherals such as a printer, scanner, external hard disk, or DVD drive
D) all of the above

E) A) and D)
F) None of the above

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Question 82

Multiple Choice

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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 ____.

A) packet switching
B) routing
C) multiplexing
D) modulating

E) B) and C)
F) A) and B)

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Question 83

Multiple Choice

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When a computer sends data over the Internet, the data is divided into small pieces, or ____.

The ____ standard specifies that computers and devices on the network share or pass a special signal, called a token, in a unidirectional manner and in a preset order.

A(n) ____________________ is a wireless network that provides Internet connections to mobile computers and other devices.

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

A(n) ____ is an adapter card, PC Card, or flash card that enables a computer or devices to access a network.

____ allows users to share documents with others in real time.

A type of communications device that connects a communications channel to a sending or receiving device is a ____.

A(n) ____ is a LAN that uses no physical wires.

Wireless access points have high-quality antennas for optimal signals.

Discuss what a dedicated line is and list the different types of dedicated lines.

A ____ is a high-speed network that connects networks in an area such as a city or town and handles the bulk of communications activity across that region.

A voice mailbox is a(n) ____ in a voice mail system.

Wireless transmission media are used when it is inconvenient or impossible to install cables.

Cable modems currently transfer data at speeds that are much slower than either a dial-up modem or ISDN.

Critical Thinking Questions Case 1 You have taken a new job as a network administrator. Although you have been an IT professional within your organization for a number of years, this particular responsibility is a new one for you, so you have been studying network topologies, for example. You are very confident about the hub you are going to use in your new network-it's brand-new and highly recommended by some colleagues that you trust. Which of the following network topologies is a good choice for you?

To help reduce copyright infringement, today's music-sharing services are free, and music files are made public as they travel across the Internet.

Computer ____________________ describes a process in which two or more computers or devices transfer data, instructions, and information.

____ is an electrical disturbance that can degrade communications.