Assuming an already configured machine named isolde, let uslook at the IP addressing and routing table. Next we will examine how the machine communicates with computers (hosts) on the locally reachable network. We will then send packets through our default gateway to other networks. After learning what a default route is, we will look at a static route.
One of the first things to learn about a machine attached to an IP network is its IP address. We will begin by looking at a machine named isolde on the main desktop network (192.168.99.0/24).
The machine isolde is alive on IP 192.168.99.35 and has been properly configured by the system administrator. By examining the route and ifconfig output we can learn a good deal about the network to which isolde is connected.