False. The receiver cannot be certain that there have been no bit errors. This is due to the way the checksum for the packet is calculated.
A checksum is a small-sized block of data derived from another block of digital data in order to detect errors introduced during transmission or storage. Checksums are frequently used to verify data integrity but are not used to verify data authenticity.
A checksum function or checksum algorithm is the procedure that generates this checksum. A good checksum algorithm usually outputs a significantly different value depending on its design goals, even for minor changes to the input.
This is especially true of cryptographic hash functions, which can be used to detect many data corruption errors and verify overall data integrity; if the computed checksum for the current data input matches the stored value of a previously computed checksum, there is a very good chance the data was not accidentally altered or corrupted.
Hash functions, fingerprints, randomization functions, and cryptographic hash functions are all related to checksum functions.
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