The routing process begins with an IP address that is unique to the sending endstation.Endstations may be assigned permanent IP addresses or they may borrow them as needed from a Dynamic Host Configuration Protocol (DHCP) server or other service.

• 路由过程始于对发送端站而言是唯一的一个IP地址，端站可以被分配永久的IP地址，或者按需要从动态主机配置协议（DHCP）服务器或其他服务中借用。