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Exam 7: Computer Networks

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Question 1

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Because geosynchronous satellites are so close above the surface of the earth,there is no delay while signals travel from earth,to the satellite,and back to earth again.

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Question 2

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-The accompanying figure shows a coaxial cable,in which pairs of copper wires are insulated with a plastic coating and twisted together.

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Question 3

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____________________ cabling can be used with both analog and digital data transmission and is commonly used for LANs.

A(n)____________________ is a network that covers a large geographical area.

Monitoring systems may also use ____,which are devices that respond to a stimulus (such as heat,light,or pressure) and generate an electrical signal that can be measured or interpreted.

The RedStar system built into many GM cars uses GPS to locate vehicles when the occupant activates the service or when sensors indicate that the car was involved in an accident.

Technically,to be called a ____,a device must convert digital signals (such as those used by a computer) to modulated analog signals (such as those used by conventional telephone lines) and vice versa.

Client-server networks are frequently referred to as peer-to-peer networks.

Electronic medical monitors are available that take the vital signs of an individual (such as weight,blood-sugar readings,or blood pressure)or prompt individuals to answer questions.

Define and discuss the advantages of telecommuting.

The most common type of mobile phone is the cellular (cell)phone.

PC conferencing is the use of networking technology to conduct real-time,face-to-face meetings between individuals physically located in different places.

-The accompanying figure displays a ____.

Collaborative computing takes place via both private company networks and the Internet.

The original first-generation cell phones were ____ and designed for voice data only.

A ____ is a network that covers a relatively small geographical area,such as a home,office building,or school.

A network,in general,is a connected system of objects or people.

In a bus network,all the networked devices connect to a central device (such as a server or a switch)through which all network transmissions are sent.

Backed by seven major electronics companies,____________________ is designed to transfer full-quality uncompressed high-definition audio,video,and data within a single room at speeds up to 25 Gbps.

-The accompanying figure shows a(n)____________________.