9.1 Hardware
Communication systems are concerned with the transfer of data or information from one location to another. Communication systems contain five major content areas: hardware, software, data, applications and people.
A link is the connection between computer devices. The physical medium used in the link can be twisted-pair cable, co-axial cable, fibre optic cable, or a non-cable link such as microwaves.
Packet switching is a method of breaking down a message into smaller groups or packets. Each packet has an address and the order it should be read in.
Write out the sentence and fill in the missing word
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A non-cable medium
that consists of high frequency radio signals is ?????. |
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A device that connects
to the computer and can be used as a modem and a facsimile is ?????. |
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A device that
enables the transmission of data from one computer to another is ?????. |
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A single copper wire
surrounded by an insulator and then encased in a wire mesh or metal sheath is
?????. |
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A special form of
microwave transmission involving an antenna suspended above the earth in a
geostationary orbit is ?????. |
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Two thin insulated
copper wires, twisted to form a spiral is ?????. |
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A device used to
send and receive data as documents over a telephone line is ?????. |
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A link that uses a
laser of light to carry data in small glass fibres about the diameter of a
human hair is ?????. |
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A method of
breaking down a message into smaller groups(packets) to provide an efficient
way to transfer data is ?????. |
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A pathway of wires
and connectors that provides the link between input, output, storage, process
and control devices is ?????. |