Lighting the Way， Securely

　　Lighting the Way， Securely

　　随着物联网的发展，越来越多的应用程序被发现，因为曾经被认为是独立的对象现在成为一个更广泛的连接网络的一部分。虽然这种扩展有能力提高生活和效率，它也有一个危险，如果它连接，那么有一个不必要的访问路径。

　　物联网的早期应用之一是连接的家庭或工作场所，包括加热和控制，因为这篇文章将显示，照明。照明是智能家居或工厂的一个关键方面。无线遥控照明将成为智能楼宇安装不可或缺的一部分。本文将探讨如何建立这样的网络，以及重要的是，它可以如何保护不受欢迎的访问。各种无线标准的优点和缺点将被考虑和实际的设计技巧，将为建立一些方面的网络。

　　Protocols and standards

　　There are various protocols and standards that govern wireless transmission and the choice is widening all the time as companies prepare for a rapidly expanding IoT. The most used is the OSI open systems interconnection model that breaks the data exchange into functional layers： the link layer converts bits into radio signals， handles data framing for wireless communications and manages access to radio channels; the network layer routes data through the network; the transport layer handles communications between applications running on two ends of the network; and the applications layer takes care of data formatting.

　　If devices have to be connected to the Internet they should use IP （internet protocol）。 However， in a local network， such as in a home where it is being used to control the lighting and other aspects， non-IP methods can be used with IP only becoming important when the communications go through an Internet gateway to the outside world. However， some argue that it is better to give every device an IP address and run IP even in the home network; others say this makes it all too complex. The jury is still out on that one.