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Exam 6: Communications, Networks, and Cyberthreats: the Wired and Wireless World

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Question 21

True/False

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A larger number of geostationary earth orbit (GEO)satellites are required for global coverage than mid-earth orbit (MEO)satellites.

A) True
B) False

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Question 22

Multiple Choice

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What wired channel,commonly used for cable TV,consists of an insulated copper wire wrapped in a solid or braided shield placed in an external cover?

A) twisted-pair
B) coaxial
C) straight wire
D) fiber-optic

E) All of the above
F) None of the above

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Question 23

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The computer that acts like a disk drive,storing the programs and data files shared by users on a LAN,is called a file server.

Analog refers to communications signals represented in a binary format.

A virus is a "deviant" program that is stored on a computer hard drive and can cause unexpected and undesirable effects.

A(n)________ uses malware to hijack hundreds or thousands of computers,called ________,and to remotely control them all.

What kind of topology (layout) is used by a network that connects all computers and communications devices in a continuous loop?

Basically,how does Wi-Fi work?

Signals such as sound and temperature,which continuously vary in strength and quality,are said to be _________.

_________ is the gradual merger of computing and communications into a new information environment,in which the same information is exchanged among many kinds of equipment,using the language of computers.

A _________ is a person who posts intentionally offensive,incendiary,or off-topic comments online.

A person sending a document over a phone line by converting a computer's digital signals to analog signals uses a ________.

The highest level that a satellite can occupy in space is known as ________.

In the ________ network topology,communications devices are connected to a single cable with two endpoints.

A(n)________ is a program that copies itself repeatedly into a computer's memory or onto a disk drive and that can cause the computer to crash.

Electronic messages are sent as ________,fixed-length blocks of data for transmission.

A ________ is a fixed-length block of data for transmission.

A ________ is a program that pretends to be a useful program,usually free,such as a game or screen saver,but carries viruses,or destructive instructions that cause problems without your knowledge.

A device that joins multiple wired and / or wireless networks in a home office is a ________.

_________ is similar to Wi-Fi but has a far greater range.