Which option ensures log persistence across reboots when logging in RouterOS?

• A. Save to disk
• B. Save to RAM
• C. Log only to console
• D. Send emails on every event

Answer: (A)

The key idea is that logs must be stored in non-volatile storage to survive a reboot. Saving to disk writes log entries to a file on the router’s disk, so after the device restarts, the log file remains and can be reviewed later. In contrast, storing logs in RAM means they disappear when the device reboots, and logging only to the console doesn't keep a retrievable record after reboot. Sending emails on every event is an alerting method, not a place where the router keeps logs for after the reboot. So saving to disk is the option that ensures log persistence across reboots.