We all have known about the OSI model, the OSI stands for Open Systems Interconnection. It is called the conceptual framework and the work done over it. Basically, the OSI model is of seven layers, these users are normally using to identify the users. Keep reading this To know the answer of your question “At What Layer Of The Osi Model Do The 802.11 Standards Vary”.
The OSI model is typically described from the top layer down. It consists of an application session, presentation layer, transport network, data link layer, and the physical layer, and the other TCP/IP. The Transport layer takes the link, the physical layer transport layer, we use the TCP network layer and we use the IP datalink layer. We have two protocols in the data link layer one is called Logical link control and the other is MAC address and we define the network layer.
At the application layer, all the applications, Telenet FTP, Email, Net management, Netware, and all come under the application and the session layer. And at the physical layer, the 802.11 standard use the implementation of the infrared, these infrared uses the ISM, the ISM stands for the industrial scientific medical brand. The 802.11 defines the unlicensed subbands.
The ISM(Industrial Scientific Medical) band consists of the three subbands that vary from different ranges. The First band ranges from 902 – 928 MHz and the second band ranges from 2.4 to 2.4835 GHz and the third band ranges from 5.725 – 5.850 GHz. The 802.11 uses the technique called Frequency-hopping spread spectrum(FHSS).
The physical layer is implemented by using this technique and uses the 2.4 GHz ISM band. It is divided into 79 subbands and each band is if 1 MHz and the remaining we call the guard bands. It is of low cost and has more power consumption. There are also consist of some other techniques like DSS(Direct sequence spread spectrum) operates with 2.4GHz and supports the higher data rates.
I hope you are satified with my answer for your question “At What Layer Of The Osi Model Do The 802.11 Standards Vary”.