For which two purposes would you use the command set log checksum?

To prevent log modification or tampering: The set log-checksum command with options like md5 or sha1 calculates a checksum value for the log data. This checksum acts as a digital signature, allowing FortiAnalyzer to verify the integrity of the logs and detect any unauthorized modifications.

To protect log data from man-in-the-middle attacks: By using checksums, FortiAnalyzer can ensure that the logs received have not been altered in transit during a man-in-the-middle attack. If the checksum of the received logs doesn't match the expected value, it indicates potential tampering.

FortiAnalyzer_7.0_Study_Guide-Online page 149