Computer Basic Information
What is backup?

Filtering old data from the new data
Adding more components to your network
Protecting data by copying it from the original source to a different destination
None of these
Accessing data on tape

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Computer Basic Information
The magnetic disks and drums are like recirculating shift registers because

their storage is non volatile
they have about the same storage capacity
None of these
stored data is available for reading over and over again in the same order.
their access times are about the same

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