Which MikroTik feature is designed to detect a host being up or down and take action accordingly?

• A. Netwatch
• B. Scheduler
• C. Firewall filter
• D. PPPoE client

Answer: (A)

Netwatch checks if a host is reachable by periodically pinging it, and it can automatically run actions when the host’s status changes. If the host becomes unreachable (down), you can attach a script to run—things like switching to a backup link, sending an alert, or adjusting routes. When the host comes back up, a separate script can run to restore normal operation. This on-the-fly response to up or down status is exactly what Netwatch is designed to do. Other options don’t provide this automatic state-change handling: Scheduler runs tasks on a schedule, firewall filters traffic, and PPPoE client manages PPPoE connections.