Lighting the Way， Securely

　　隨著物聯(lián)網(wǎng)的發(fā)展，越來越多的應(yīng)用程序被發(fā)現(xiàn)，因為曾經(jīng)被認為是獨立的對象現(xiàn)在成為一個更廣泛的連接網(wǎng)絡(luò)的一部分。雖然這種擴展有能力提高生活和效率，它也有一個危險，如果它連接，那么有一個不必要的訪問路徑。

　　物聯(lián)網(wǎng)的早期應(yīng)用之一是連接的家庭或工作場所，包括加熱和控制，因為這篇文章將顯示，照明。照明是智能家居或工廠的一個關(guān)鍵方面。無線遙控照明將成為智能樓宇安裝不可或缺的一部分。本文將探討如何建立這樣的網(wǎng)絡(luò)，以及重要的是，它可以如何保護不受歡迎的訪問。各種無線標準的優(yōu)點和缺點將被考慮和實際的設(shè)計技巧，將為建立一些方面的網(wǎng)絡(luò)。

　　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.