Cisco Router Question: Cisco 2901

Question: I've logged into a Cisco 2901 and typed 'show ip route'. And it says something like this:

192.168.10.0/24 directly connected to fastethernet0/0

192.168.9.0/24 directly connected fastethernet0/0

I don't fully understand what the above means?

Answer: It means those routers are derived from the IP address/mask of your interfaces and are automatically generated.

The router is connected, and can reach, two different LANs (or networks).  192.168.10 and .9 IPv4.

You router interface f0/0 is configured for  seconday ip addresses

Ip address x.x.x.x y.y.y.y secondary

The more infornation or overview of Cisco router, please visit: http://ciscorouteroverview.tumblr.com