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All about Wi-Fi Technology

Date Added: February 05, 2011 04:21:10 PM
Category: Computers
Wi-Fi is the name of a standard wireless networking technology that makes use of radio waves to provide wireless high speed internet and network connections. Though strictly speaking it is not a technical term, however it is defined as “wireless local area network products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards”. Various gadgets equipped with this technology can link to the internet within range of a wireless network, connected to the internet. Nowadays devices like personal computer, smart phone or digital audio players, are launched with Wi-Fi features. Initially it was used to substitute 2.4GHz 802.11b standard. But later on, the Wi-Fi alliance, the organization that owns the register trademark of ,Wi-Fi expanded the generic use of the term to include any type of network or WLAN product based on 802.11 standards. This also includes 802.11b, 802.11a, and dual band and so on. The expansion was done to end confusion about wireless LAN interoperability. Later on, the term Super Wi-Fi was derived from this term by U.S Federal communication commission. This network functions with no physical connection between the sender and receiver. It employs radio frequency technology. Radio frequency is a frequency within the electromagnetic spectrum, linked to radio wave propagation. If a radio frequency signal is applied to an antenna, an electromagnetic field is produced, which is able to transmit through space. The foundation of any wireless network is an access point. The main task of an access point is to transmit a wireless signal that this technology enabled devices can detect and tune into. Though the coverage of one or more interconnected access points usually consists of an area of few rooms but it could be expanded to cover many square miles depending on the number of the access points with overlapping coverage. This technology is supported by many by many applications and gadgets comprising mobile phones, video game consoles and other types of consumer electronics. Apart from being privately used at home and offices, it can provide internet access to commercial subscribers. Organizations or businesses regularly provide free-use hotspots to attract clients. Router with a digital subscriber line modem and an access point can provide internet access to all devices connected to it. With the support of new technologies like MiFi and WiBro one can easily create his/her own hotspots that link to internet through cellular networks. It is also possible to connect this type of devices in ad-hoc mode for client to client connections without a router. Nowadays, many city service providers offer city-wide access. It also made it possible to connect one computer to another without the involvement of an access point. This is known as ad-hoc mode. Ad-hoc mode has been very popular with multilayer handheld game consoles like digital cameras. The main advantage of this technology is the implementation of local area networks without any wire which reduces the cost of network implementation. It is particularly useful in those areas where cable cannot be run. The main drawback of it is that spectrum assignments and operational limitations are inconsistent world wide. Also the very limited practical range of this technology restricts mobile use to limited applications like inventory taking machines in warehouses or retail spaces, barcode reading devices at check out stands. Mobile use of this network over broad ranges is restricted. Data security risk is quite high in this technology. The wireless encryption standard has been proved to be easily breakable. On unencrypted networks the connected devices can monitor and record data including personal information. A hacker who gained access to this network could initiate a DNS spoofing attack against any other user on the network by faking a response before the queried DNS server replies. A minuscule percentage of Wi-Fi users have reported adverse health issues after prolonged exposure to the network. The most common sicknesses, reported by those who have fallen sick due to over exposure to Wi-Fi, have been described as ‘headaches’, nausea, panic attack, mental anxiety, cognitive impairment etc. For more than last two decades Pecon has been involved in providing software solutions, hardware sales and maintenance of products like desktop, laptop, server, printer, networking equipment like hub, switch, router etc. integrates technologies, maximizes network performance and delivers communication solutions in the most cost-effective way - assuring flexible, open systems capable of integrating today's new technologies with tomorrow's new technologies.