Our Digital World 6.2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| communications system | In the context of a computer network, a system that includes sending and receiving hardware, transmission and relay systems, common sets of standards so all the equipment can “talk” to each other, and communications software.
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| network protocol | A rule for how data is handled as it travels along a communications channel.
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| analog signal | An electronic signal formed by continuous sound waves that fluctuate from high to low.
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| digital signal | A discrete electronic signal that is either high or low. In computer terms, high represents the digital bit 1; low represents the digital bit 0.
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| modem | A piece of hardware that sends and receives data from a transmission source such as your telephone line or cable television connection. The word modem comes from a combination of the words modulate and demodulate.
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| frequency | The speed at which a signal can change from high to low; a signal sent at a faster frequency provides faster transmission.
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| bandwidth | The number of bits (pieces of data) per second that can be transmitted over a communications medium.
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| broadband | Any communications medium that is capable of carrying a large amount of data at a fast speed.
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| kilobit per second (Kbps) | A transmission at a rate of 1 thousand bits per second.
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| megabit per second (Mbps) | A transmission at a rate of 1 million bits per second.
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| gigabit per second (Gbps) | A transmission at a rate of 1 billion bits per second.
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| terabit per second (Tbps) | A transmission at a rate of 1 trillion bits per second.
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| petabit per second (Pbps) | A transmission at a rate of 1 quadrillion bits per second.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
softcrylic
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