This document is designed to give the reader a working knowledge of TCP/IP subnetting, addressing, and routing. It is not intended to be complete, or to cover all issues.
本文档写作目的是让读者对TCP/IP子网、寻址和路由有一个正确的了解，它不会非常完整或者涉及到所有问题。
In just a few years, every door lock, card reader, video camera, vehicle, power meter, and light switch will have an IP address — at least in the business world.
数年之内，至少在商业领域，每一个门锁，每一个读卡器，每一个摄像头，电表，甚至是电灯开关都会被赋予一个IP地址。
In just a few years, every door lock, card reader, video camera, vehicle, power meter, and light switch will have an IP address — at least in the business world.
数年之内，至少在商业领域，每一个门锁，每一个读卡器，每一个摄像头，电表，甚至是电灯开关都会被赋予一个IP地址。
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