Why is a Kill Switch necessary, and what happens without it during a connection drop?

IT BLOCKS INTERNET ACCESS IF THE VPN TUNNEL DROPS, PREVENTING IP LEAKS.

A Kill Switch instantly cuts off all device network traffic if the secure connection drops unexpectedly. Without this feature, your real IP address and unencrypted data are immediately exposed to your internet service provider.

The Vulnerability of the Drop Moment

When reconnecting to a server, switching cell towers, or encountering a client glitch, the operating system automatically falls back to an open network interface. During these few seconds, apps continue sending background requests, exposing the user's true location, DNS queries, and unencrypted sessions.

Setup Recommendations

Enable the Kill Switch in your VPN client settings before starting work
On Android, turn on the system option "Block connections without VPN" in connection settings
Verify there are no leaks using specialized web checkers after intentionally dropping the tunnel