Consider the following command and an abbreviated version of its output: $ netstat nr Kernel IP routing table Destination Gateway Genmask Flags Iface 192.168.165.0 0.0.0.0 255.255.255.0 U ethO 127.0.0

In the routing table output, the row with Destination 0.0.0.0 and Flags UG (U=route is up, G=gateway) represents the default route. The Gateway column for that entry shows 192.168.165.1, which is the IP address to which all unmatched traffic is forwarded. This is the standard Linux representation of the default gateway.

255.0.0.0 is the Genmask (subnet mask) for the loopback network route, not a gateway address.

255.255.255.0 is the subnet mask for the 192.168.165.0 local network entry, not a gateway.

0.0.0.0 in the Destination column denotes the default route (catch-all destination), not the gateway IP address itself.

192.168.165.0 is the local network address for the eth0 interface subnet, not a gateway.