什么是 IP 地址？
“IP address” stands for Internet Protocol address, and each device that is connected to a network (like the internet) has one.
IP 地址类似于您的电话号码，它是唯一的，这样别人就能找到您。同样，IP 地址也是惟一地标识您计算机的一组数字，这样它就可以发送和接收别的计算机数据。
当前，绝大多数 IP 地址由四组数字组成，由点分开。例如 192.168.1.42 就是一个 IP 地址。
An IP address can either be dynamic or static. Dynamic IP addresses are temporarily assigned each time your computer connects to a network. Static IP addresses are fixed, and do not change. Dynamic IP addresses are more common that static addresses — static addresses are typically only used when there is a special need for them, such as in the administration of a server.