Overview of Wireless LAN/ Wi-Fi / IEEE802.11

As the competition in businesses/corporates is increasing, every minute counts and hence the demand for more productivity, faster response, lower costs is constantly increasing. No doubt, Wired LAN is used most commonly in almost all business / corporate offices, however, if the employer/employee wants to access the even when not present with the traditional desktops, it was not possible. And such kind of demands gave raise to the concept of Wireless LANs.IEEE 802.11 is the Wireless LAN standard from IEEE (Institute of Electrical and Electronics...

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Data communicaitons - CRC Error Detection code

We know that as the data is transmitted, there will be errors introduced, resulting in the change of one or more bits in the transmitted frame. Hence, it is necessary to detect any errors in the transmitted datat to make that what was transmitted is what is received. For this purpose there are many Error detection schemes viz., Parity Check, Cyclic Redundancy Check (CRC) have come up.CRC is the most commone and one of the most powerful error-detecting codes.CRC can be described as follows:"Given a k-bit block of bits, the transmitter generates...

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