A name indicates what we seek. An address indicates where it is. A route indicates how we get there.
—Jon Postel, American computer scientist
Messages need addresses if they are to be delivered. This chapter offers a brief overview of the addressing scheme used for networks and network devices.
The IP Address
Every network has a unique address. The address of a network (the network number) is the network prefix common to the IP addresses of all the devices belonging to that network.1 As a thumb rule, an IP address is assigned to anything in a network that needs to be uniquely identified and that is needed to exchange ...