Computers: Understanding Tech 5e 3.9
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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| direct-attached storage (DAS) | Local data storage; storage of data on the computer itself or on an external device directly plugged into it.
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| network-attached storage (NAS) | Storage that’s made available over a network, such as on a centrally accessible file server.
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| NAS appliance | Short for network-attached storage appliance. A specialized computer built specifically for network file storage and retrieval.
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| storage area network (SAN) | A network storage technology that enables users to interact with a large pool of storage (including multiple devices and media) as if it were a single local volume.
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| redundant array of inexpensive disks (RAID) | A technology that attempts to improve performance, data safety, or both by combining multiple physical hard disk drives (HDDs) into a single logical volume.
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| RAID0 | A type of RAID that improves performance by striping the data.
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| striping | Spreading out data to be stored across multiple discs, and writing to all the discs simultaneously, to improve the speed at which data can be written and read.
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| RAID1 | A type of RAID that improves data safety by using mirroring.
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| mirroring | Writing an identical backup of a drive’s content to another drive simultaneously, so the data will continue to be available if the main disk fails.
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| RAID5 | A type of RAID that combines striping (for performance) with distributed parity (for data protection).
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| disk array | A group of disks that work together, such as in a RAID system.
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| parity bit | An extra bit written to a disk array during each write operation that helps reconstruct the data in the event of the failure of one of the drives in the array.
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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.
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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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