Data Integrity and Immutability | CompTIA Server+ Exam SK0-004
Question
Which of the following is designed to guarantee that once data is written it cannot be modified? (Select TWO).
Answers
Explanations
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A. B. C. D. E.CE.
The two options that are designed to guarantee that once data is written, it cannot be modified are CD-R and WORM.
CD-R (Compact Disc Recordable): Once data is written to a CD-R, it cannot be modified or erased. The data is physically burned onto the disc using a laser, which creates bumps and pits on the surface of the disc that represent the data. Once the data is written, it is permanent and cannot be changed. CD-Rs are a good option for archiving data that needs to be kept for a long time.
WORM (Write Once Read Many): WORM technology allows data to be written to a storage device once and then read multiple times, but it cannot be modified or erased. This technology is commonly used in optical discs, such as CD-ROMs, DVDs, and Blu-ray discs. WORM technology can also be used in hard drives, solid-state drives (SSDs), and tape storage.
Flash memory, DLT4 tapes, and SDLT tapes are not designed to guarantee that once data is written, it cannot be modified. Flash memory is rewritable and can be modified. DLT4 tapes and SDLT tapes are magnetic tape storage technologies that are also rewritable, which means that data can be erased and new data can be written over the top.
