The basic system of the Wi-Fi is very simple. In a networked computer with WiFi cards connect to a WiFi access point or wireless router. This access point or router Internet helped the usual way, connected to the Internet via a cable modem or DSL. Any PC or laptop with a Wi-Fi card, which is within 200 feet (60 meters) from the access point can access the Internet. However, a distance of 100 feet (30 meters) is considered ideal for goodquality access. An area around an access point for wireless access, called a wireless hotspot.
Technology
The technology used in WiFi is the easiest to understand, in terms of radio. It 's very similar to the walkie-talkie, the only difference in the strength of the signals. A simple walkie-talkie that can handle only limited data in the range of 1000 bits per second, and working at 49 MHz. In the case of Wi-Fi radio, the signal is much greater, socan handle much higher data rates. WiFi radios typically operate at a frequency of 2.4 GHz
There are three versions of Wi-Fi radio available today, those who work with, 802.11g and 802.11a and 802.11b standards. While the first two-802.11b and 802.11g-2.4 GHz, the 802.11a radio operating on a standard capable of transmitting at 5 GHz for the post.
Another important feature of the Wi-Fi radio that allows higher data transfer rates, coding techniques used. 802.11aand 802.11g wireless standard to use Orthogonal Frequency Division Multiplexing (OFDM) technique, while 802.11b uses Complementary Code Keying (CCK) technique.
Higher frequencies and encryption techniques, WiFi radio can transmit a large amount of data per second. The 802.11a and 802.11g radio standard between 30-54 megabits per second and 802.11b typically emits 7.11 megabits per second.
The WiFi Alliance has developedcertification standards for laptop computers and other electronic devices such as PDAs. Most of these devices today are WiFi certified. This means that these items are interoperable, regardless of brand.
Benefits
Wi-Fi technology was designed to increase comfort and increased productivity that mobile computing and communications introduced in today's scenario, workers move a lot of things. Usually carry laptops, PDAs andother gadgets and the need to have access to the company, regardless of where they are. WiFi is an effort, cost effective and quickest way to adopt a network. It also allows greater flexibility.
A WiFi-enabled work environment helps employees stay connected longer and also interact with colleagues easily.
Security risk factor
A wireless access point is a danger that universal access to information as they are within an accessibledistance. E 'therefore important to take safety precautions, while creating a WiFi network in your organization. The degree of protection depends on the nature of information processing in your organization. If the information is very sensitive, you should go for the custom security.
Wi-Fi or Wireless Fidelity, a technology standard developed in 1997 by the Institute of Electrical and Electronics Engineers (IEEE). WiFi is all high-speedWi-Fi. In today's scenario, workers generally move a lot and they operate from different stations, in addition to their cabin office. Gadgets like laptops and PDAs have been developed to meet this need, it was also necessary for wireless Internet technologies to improve their function to develop. This is where WiFi comes into play
WiFi is fast
WiFi generally provide access to the Internet faster than DSL and cable connections, a clear advantage forcompanies. The high speed is also useful when you're on. There is a promise of improved productivity here.
WiFi is useful
You can access the Internet from your Wi-Fi device wherever you are, as long as you're within range of a base station or source. So employees can move around with their gadgets from their cabin along the corridor to the room all without losing the connection. You can also access the corporate network from your laptopor PDA, even if you're in a different place, as a business partner of an office, hotel or conference center as long as this place has WiFi.
And 'even faster and more profitable for the company to create a wireless network than a wired connection.
Wi-Fi is everywhere
Wi-Fi technology has been marketed, so most of the information and communication gadgets such as laptops and PDA access. In addition, these WiFi Gadget certified interoperable, regardless of brand.
On the other hand, public sites or Wi-Fi hot spots are also increasing. More and more offices, libraries, lounges and restaurants are the creation of WiFi hot spots in the hope that this will lead to their tech-savvy customers to stay informed. In some cities, whole neighborhoods and business districts of the creation of the biggest hotspot.
Disadvantages
The small number is the biggest disadvantage> WiFi. Although you can move without wires, is severely limited mobility. Most typically, this is a radius of 100 meters or so the hotspot.
Earlier versions of WiFi radio much power drain, which is a disadvantage for the laptops when the battery depends. Also nearby devices such as microwave ovens and cordless phones cause interference.
Security is another major threat. It 's easy for anyone to access the wireless network when not careful. It 'so important for the strict security measures, depending on the sensitivity of the information you handle the installation.
Wi-Fi
Wi-Fi uses radio technology for communication, and usually runs at 2.4 GHz or 5 most of the new WiFi enabled devices are now certified, which means not only that they are enabled Wi-Fi, but also that these devices are interoperable.
In a Wi-Fi network, computers with a > WiFi network can connect wirelessly to a WiFi router. The router is connected to the Internet via a cable modem or DSL. It connects to a WiFi device within 60 meters or so of the access point can the Internet.
Some are open WiFi hotspot, meaning that anyone with a connected device within range can access them, while others are closed, meaning that only authorized users can access with a password.
Where> WiFi can help
Interoperability is a big advantage of WiFi. WiFi allows users to connect to the Internet and other and other devices. It also helps to transcend imitation distance using wires and saves some of the costs.
Wi-Fi technology is of particular benefit to people in marketing and sales, as these areas involve a lot of travel. In fact WiFi can help everyone to move around a lot at work. Can accesstheir work e-mail or corporate databases, wherever they are using WiFi technology. This Wi-Fi technology allows companies to grow and expand rapidly.
In addition, companies not to throw away their existing network infrastructure to start the WiFi. It 's very easy to integrate WiFi into your existing wired network. This gives a clear cost advantage WiFi.
As we saw earlier, the Wi-Fi uses the bandwidth and speed from 2.4 to 5 GHzranging from 10 to 50 Mbps This is comparable to the speed of a T1 line.
Security
All said and done, security is one of the biggest problems with a wireless network. This is particularly relevant in the case of a plug and play technology such as WiFi. If you are not careful enough, all close enough to the base station can intercept the data sent and received from the network or enter into your system.
It 'so important to take sufficient security measures, the creation of a WiFi hotspot in your home or office. Safety also applies when a public hotspot with your laptop or other access devices.
Wi-Fi phones
A WiFi phone is a wireless device that lets you double the benefits of wireless connectivity and cost savings of VoIP. It can be used in areas where hotspots, the Wi-Fi connectivity is provided. If there are obstacles, you will be able to use a WiFi connection > Phone in a radius of 300 feet (90 meters) from the point of activation. But this also depends on the number of people access to the access point at the given moment.
What can make a WiFi phone
Just like a cell phone, you can use a WiFi phone for calls, SMS and voice messages to a certain extent also the access to the Internet. The Wi-Fi phone is able to retrieve data and Internet access over a cell > Phone.
As wireless hotspots becoming more widespread, a Wi-Fi phone lets you talk with your family, friends and people around the world at cheaper prices much more than a regular phone possible. Everything you need to make sure you are within range of a WiFi hotspot.
In other words, you can use your wireless phone at home, hotels, offices, airports, internet cafes, business centers or a little 'wherever there is a> WiFi network. More and more metropolitan areas and commercial outlets are distributing free or low cost WiFi hotspot, so you have many places where you can call the Wi-Fi to make and receive calls.
Most of the WiFi phone models on the market come with features like echo, Lost Packet Recovery, and packet delay compensation. So you can expect excellent sound quality of WiFi phones.
L 'Hitch
The problem with Wi-Fi is the field and that goes for WiFi phones. You can not roam outside the hotspot, or between two points, and that means a limited mobility during a call, WiFi . Also, many Wi-Fi enabled phones to turn off the Wi-receptor when not in use, saving to save. This can lead to miss incoming calls. However, we can expect these problems will be solved soontechnology develops.
The Bottom Line
The cost is the most important factor here. The average American worker now spends $ 50 a month for phone calls. Hotspots are free or much cheaper than, and multiply rapidly. Turning to WiFi phones, consumers and medium enterprises can save a lot on your phone bill. From this perspective, the WiFi phone looks like the next big thing in the telecommunications revolution.
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