Answer:

IEEE 802.11:

• In 1990, a new IEEE committee called IEEE 802 the IEEE 802.11 standard defines a broadcast interface between a wireless client and a base station or between two or more wireless clients. As the abilities are added to the IEEE 802.11, some become known by the name of the amendment. 802.11 Standard is also widely known by “Wiâ€ÂFi”. This technology spreads a radio signal out over a wide range of frequencies, making the signal less susceptible to intrusion and difficult to intercept.
• The 802.11 standard focuses on the bottom two layers of the OSI model, the physical layer (PHY) and data link layer (DLL). Because of the common interface furnished to upper layers, any LAN application, network operating system, or protocol including TCP/IP will run on an 802.11 compliant WLAN.
• WLANs support asynchronous data transfers that refer to the traffic that is almost unresponsive to time delays such as electronic mail and file transfers.
• WLANs can also support the traffic which is surrounded by the particular time delay to achieve an acceptable quality of service (QOS) such as packetized voice and video.
• 802.11 MAC is common to all 802.11 Physical Layer (PHY) standards as shown below in the architecture figure of IEEE 802.

The objective of the IEEE 802.11 standard:

• The objective of the IEEE 802.11 standard was to define a medium access control (MAC) sub-layer, MAC management protocols and services, and three PHYs for wireless connectivity of fixed, portable, and moving devices within local area. The three physical layers are an IR baseband PHY, an FHSS radio in the 2.4 GHz band, and a DSSS radio in the 2.4 GHz. All three physical layers support both 1 and 2 Mbps operations.

Basic goals of IEEE 802.11 standard:

1. To increase throughput to at least 1 Gbps to be shared by devices connected to an AP in the under 6 GHz band with the ability for a single link to utilize at 500 Mbps.
2. The single link execution of at least 1 Gbps in the 60 GHz band.