Introduction to WIFI WLAN
How IEE802.11g Enhances 802.11 Networks
The 802.11g specification enhances 802.11b by upgrading the data rates whereby it uses 22 and 33 Mbps. The 802.11b specifications are enhanced and the data rate is controlled and compacted with the original 802.11 DSSS standard. Identically, the IEEE 802.11g standards give reverse compatibility with the 802.11b devices to protect the investments in the current wireless LAN installations. Nevertheless, the provision of the four physical layers is one way of how the IEEE 802.11g standard enhances the 802.11b network despite that the IEEE 802.11b works at a frequency of 2.4 GHz (Shaw, 2020). Another way of how the IEEE 802.11b is enhanced is through the extended rate of PHY specification whereby when IEEE 802.11b stations bring in the network, the IEEE 802.11g give support of 20us slot and 31 slots at a minimum contention window of 802.11b. However, the parameters used to enhance the performance with DSSS modes. There is another way of how the IEEE 802.11b is enhanced by the IEEE 802.11g and that is through the distribution and coordination function wherein the process of the same transmission of the data rates the IEEE 802.11g covers two times of the IEEE 802.11a (Mathias, 2009). Nevertheless, the IEEE 802.11g provides protection mechanism where it uses fourteen data rate which is different and also other four different physical layers.
How 802.11n Functions in both the 2.4 GHz and 5GHz Bands
Generally, the IEEE 802.11n is better than the IEEE 802.11g because it provides faster data and it uses fewer devices. However, it can be deployed on both the 2.4 GHz and the 5 GHz range. In the olden days, 802.11a was the only WIFI standard which used the 5 GHz band but it disappeared when the 802.11b and 802.11g cracked ( Tabrizi, Golnaz & Clioffi, 2012). The 802.11n multitask the channels because it increases the performance by taking up 40MHz chunk instead of the standard 20 MHz chunks. Therefore data is delivered at an above rate of 100Mbits/ sec. Additionally, the IEEE 802.11n performs better because the 2.4 GHz is narrower and also is more occupied than the 5 GHz band so it the better option because it has the top speed for the wireless networks (Greenwald, 2010). Furthermore, it requires devices that support 5 GHz 802.11n less which is not a common feature.
Any other important current and future amendments to 802.11?
There are arguments that the new IEEE802.11 to be revised the WIFI standard and to be increased bandwidth and also with an increased number of spatial streams which will be able to provide data rate up to 40Gbps. The operating group insights people about how they are looking forward to making innovations for the 11be (Yi-hua Zhu, Leung, 2014). Many features are proposed for the amendment of new technology will contribute to the development of 802.11.
Components and models of operation of a WLAN and power management features of IEEE 802.11 networks.
- User Devices- people who use LANs operate many devices like PCs laptops as well as PDAs. Similarly, the use of wireless LANs has a benefit of the limited needs which are needed for wiring.
- Radio NICs– there is a major part of the wireless LAN which includes a radio NIC and also it operates inside a computer. There are also wireless radio cards that implement many versions of the IEEE 802.11 standard. Mainly these cards give good interoperability and they are highly common in these days.
- Access Points- access points contain a radio card for communication of the user and also a wired NIC that interfaces to a distribution system. Here, the system software connects between the wireless LAN and the distribution sides of the access point.
- Routers- a router is used to transfer in between the networks (Afaqui, Aguilera & Villegas, 2016). Here the router is used to choose the next and the best link for sending of packets to a closer destination. Consequently, the routers use internet protocol (IP), the routing table for the best path for every packet. A wireless LAN router is used to access point function to multiport Ethernet router.
References
Greenwald, W. (2010). WIFI 802.11n 2.4 GHz. 5 GHz Difference. Carolina: Tech concepts.
Heleh Tabrizi, Golnaz Farhadi & j.m Clioffi. (2012). An Intelligent power save mode Mechanism for IEEE 802.11 WLAN. 802.11, 2-14.
Mathias, C. J. (2009). Innovative WLAN Architecture. New Yolk: SearchNetworking.
Shahwaiz Afaqui, Elena Lopez- Aguilera & Eduard Garcia- Villegas. (2016). IEEE802.11ax . Challenges and Requirements for future High Efficiency, 99 100.
Shaw, K. (2020). 802.11 WIFI Standards and Speed. London: Network Word.
Yi-hua Zhu, Victor C.M. Leung. (2014). Enhancing Timer-based power Management in Infrastructure IEEE 802.11 WLANs. IEEE 802.11, 22-24.