Which of the following statements would create a default route using a gateway of 192.168.1.1?

`netstat` is primarily for displaying network connections and routing tables, not for adding routes.

The syntax `route default 192.168.1.1` is incomplete and not the correct way to add a default route using the `route` command.

While `ip route` is the modern command for routing, `ip route default 192.168.1.1` is not the correct syntax; it should typically be `ip route add default via 192.168.1.1`.

The `route add default gw 192.168.1.1` command correctly adds a default route to the routing table, directing all traffic for unknown networks through the gateway at 192.168.1.1.

`ifconfig` is used for configuring network interfaces, not for directly adding default routes to the kernel's routing table.