What does Netwatch do?

• A. Monitors host, takes action on an up/down condition (Layer 3)
• B. Measures bandwidth usage
• C. Creates routes automatically
• D. Manages firewall rules

Answer: (A)

Netwatch checks whether a host is reachable by periodically pinging it, focusing on IP-level connectivity (Layer 3). When the host stops responding, Netwatch can run a Down script to take automatic action, and when the host replies again, it can run an Up script. This makes Netwatch ideal for detecting a device going offline and then coming back online, and for triggering automated responses or notifications based on that state change. It isn’t built to measure bandwidth, automatically create routes as a primary function, or manage firewall rules by itself (though scripts it runs can implement such actions if needed).