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

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

The syntax `route default 192.168.1.1` is incomplete and syntactically incorrect for adding a default route using the `route` command.

While `ip route add default via 192.168.1.1` is a correct modern command, the provided option `ip route default 192.168.1.1` is syntactically incorrect.

The `route add` command is used to manually add an entry to the kernel routing table. The `default gw` syntax specifies that the entry is for the default route, directing all traffic for unknown networks through the specified gateway IP address.

`ifconfig` is used for configuring network interfaces (like setting IP addresses), not for adding routes to the routing table.