Flashcards
Encryption & Defragmentation
Cards in this deck (4)
- 1What is Encryption?> "Scrambling" of data
> Applies a special encryption algorithm to the data
> Strong algorithms require long mathematical research
> Special key is required to decrypt the data
> Usually within the OS to encrypt and decrypt files in real time - 2What is Fragmentation?> Files in secondary storage are not always written in one continuous block (i.e., they may be split up)
> Fragmented files - those that are not contiguous - take longer to load - 3What is Defragmentation?> Software that reorganises the data on the storage device so that all files are stored in adjacent blocks
> Defragmented disks increase the performance of the computer - 4How does Fragmentation affect SSDs?> Fragmented data does not take any longer to load, since SSDs provide random acces
> SSDs should not be defragmented, since the reorganisation can shorten its lifetime as it pushes it towards the read/write cycle limit
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- A level Computer Science (Applications Generation) Flashcards on Encryption & Defragmentation, created by Malachy Moran-Tun on 05/12/2022.
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- Malachy Moran-Tun
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- Created by Malachy Moran-Tun · Nov 30, 2022
- Copied by Malachy Moran-Tun · Dec 5, 2022
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