The Traffic Manager

A computer communicates with other computers through network interfaces. In general there is a network interface for each network card (for computers that have several network cards). A network card (Ethernet or wifi) has a mac address which identifies the network card on the network. To operate a network card you must configure the interface that corresponds to it. The if config command allows you to know the network configuration and configure the network by hand or in a script. On the internet stations called hosts have IP addresses which allow them to be identified but a host can also often be designated by a host name or domain name (like google.Com). The DNS (domain name system) was designed to solve this problem by offering a hierarchical model. Each machine (printer terminal server etc.) connected to a network is assigned a small name. This name is unique within the domain to which it belongs. Thus for the domains domain1.Com and domain2.Com we can have two machines with similar or different names.