![]() ![]() This entire routing table was written automatically by the OS. Both are up, both have been set automatically by the operating system as default routes to the gateway 192.168.1.1, and both have had a route built automatically by the operating system to the 192.168.1.X network. My routing table, below, shows two different interfaces, eth0 and wlan0. Other posters thus far have not considered the importance of the metric values in a routing table. If the OS tries to reach the same external network and also succeds using eth1, it will also add that interface ( eth1) into the routing table as an additional way to reach that same network. If the OS tries to reach an external network and succeeds using eth0, it will add that interface to the routing table and tie it to that network. ![]() Many Operating Systems will detect more than one valid interface, capable of reaching the internet, and setup each of them for carrying traffic to the internet (specifically, gateways that ultimately connect to the internet). Different distros of Linux, Unix, some versions of Microsoft Windows, and many other Operating Systems are not limited to using just one network interface to reach the internet. ![]()
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