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Exam 10: Communications and Networks

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Question 1

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Critical Thinking Questions Case 10-1 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. If you are charged with setting up a network for your team and there is one device whose reliability you are concerned about, which of the following network topologies is a bad idea for you?

A) bus
B) star
C) ring
D) intranet

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

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Question 2

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Which of the following is a wireless transmission medium that distributes radio signals through the air over long distances?

A) mobile transmission
B) optical resolution
C) bandless transmission
D) broadcast radio

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

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Question 3

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Some mobile users have a wireless modem that uses a mobile phone provider's network to connect to the Internet wirelessly from a computer or other mobile device.

Most of today's computer networks use coaxial cable.

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

How many feet can the range of Bluetooth devices be extended with additional equipment?

With TCP/IP, each packet contains data as well as the recipient (destination), origin (sender), and the sequence information used to reassemble the data at the destination.

Infrared requires ____________________ transmission, that is, the sending device and the receiving device must be in line with each other so that nothing obstructs the path of the infrared light wave.

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 ____________________.

COGNITIVE ASSESSMENT What is another term for an Internet peer-to-peer network?

Fiber-optic cables have the capability of carrying significantly more signals than wire cables.

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

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?

COGNITIVE ASSESSMENT Which of the following offers an alternative to infrared communications with high bandwidth transmissions?

Which of the following are radio waves that provide a high-speed signal transmission?

Which of the following is the least likely technology PANs would use?

A(n) ____________________ line is equal in speed to 28 T1 lines but quite expensive.

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

Discuss what hardware is needed for a wireless, Internet-connected home network.

____________________ technology uses short-range radio waves to transmit data between two devices.