Which of the following statements about deduplication is incorrect?

Deduplication is categorized as source-end deduplication and target-end deduplication.

Source-end deduplication is implemented as follows: At the source end, hash comparison is performed for data blocks to be transferred. If a data block has been transferred, only the corresponding hash index value will be transferred.

Target-end deduplication is implemented as follows: Data is transferred from the source end to the target end. If the target end contains the same data, data duplicates will be deleted, and only the unique data remains.

Both source-end deduplication and target-end deduplication reduce the host CPU performance.