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把1台计算机加入某个局域网域时,通常的做法是在该机器中插入1块网卡,并为它设置1个IP地址。而当这台机器需要作为内部网桥连接2个局域网时,就需要在机器内插入2块网卡,并分别为每块网卡设置一个IP地址。当然,如果连接多个局域网的话,这台机器就需要插入多块网卡了。其实,在许多操作系统(包括Windows、Unix和Linux等)都提供了可对1个局域网接口设置多个IP地址的功能,因此,完全可用1块网卡来完成2块甚至更多块网卡的功能。
A computer to join a local area network, the usual practice is to insert a card in the machine, and set up an IP address for it. When this machine needs to connect two LANs as internal bridges, it needs to insert two NICs in the machine and set one IP address for each NIC separately. Of course, if you connect multiple LAN, this machine will need to insert multiple network cards. In fact, many operating systems (including Windows, Unix and Linux, etc.) provide the ability to set multiple IP addresses for one LAN interface. Therefore, a single NIC can be used to complete the function of two or more network adapters .