What is WIFI? - Slap The Wizard

Sabtu, 27 September 2014

What is WIFI?

Understanding Wi-Fi Network - Friends Pustakers, on this occasion, the school library will share information about pengertin Wi-Fi network. Wi-Fi is short for "Wireless Fidelity", has the meaning of the set of standards used for Wireless Local Networks (Wireless Local Area Networks - WLANs) based on IEEE 802.11 specification. The latest standard of 802.11a or b specifications, such as 802.16 g, is currently in preparation, the latest specification offers many improvements ranging from broad coverage even further up the transfer speed. Wi-Fi was originally intended for the use of wireless devices and the Local Network (LAN), but now more widely used to access the Internet. This allows anyone with a computer with a wireless card (wireless card) or personal digital assistant (PDA) to connect to the internet using an access point (or hotspot known) nearby. 

Specifications of Wi-Fi 
Wi-Fi is designed based on the IEEE 802.11 specification. Now there are four variations of 802.11, namely: 802.11a, 802.11b, 802.11g, and 802.11n. Specifications b is the first Wi-Fi product. Variation of g and n is one product that has the most sales in 2005 in many parts of the world, the frequency used by Wi-Fi, users are not required to obtain permission from local regulators (eg, the Federal Communications Commission in the USA). 802.11a uses a higher frequency and therefore its range is narrower, other things being equal. 
Wi-Fi version of the most extensive in the United States market today (based in IEEE 802.11b / g) operate at 2,400 MHz to 2483.50 MHz. With so allow operations in 11 channels (5 MHz each), centered on the following frequencies: 
Channel 1 to 2.412 MHz; 
Channel 2 to 2.417 MHz; 
Channel 3 to 2.422 MHz; 
Channel 4 to 2.427 MHz; 
Channel 5 to 2.432 MHz; 
Channel 6 to 2.437 MHz; 
Channel 7 to 2.442 MHz; 
Channel 8 to 2.447 MHz; 
Channel 9 to 2.452 MHz; 
Channel 10 to 2.457 MHz; 
Channel 11 to 2.462 MHz 
Technically operational, Wi-Fi is one of the variants of communication and information technology that works on the network and device WLANs (wireless local area network). In other words, the Wi-Fi is the trade name (certification) is given to the manufacturer of telecommunications equipment (Internet) network working in WLANs and already meets the required quality interoperability. 
Internet technology-based Wi-Fi is built and developed a group of engineers who worked on the United States Institute of Electrical and electronis Engineers (IEEE) technical standard based devices numbered 802.11b, 802.11a and 802.16. Wi-Fi device is not only able to work in a WLAN network, but also on network Wireless Metropolitan Area Network (WMAN). 
Because the device with the technical standard 802.11b WLAN devices are intended for use in the 2.4 GHz or commonly called ISM (Industrial, Scientific and Medical). Moderate technical standards for devices intended for 802.11a and 802.16 WMAN devices or also called Wi-Max, which works around the 5 GHz frequency band. 

High public interest in the community-especially the Internet-using Wi-Fi technology due to at least two factors. First, the ease of access. That is, the users in the area can access the Internet simultaneously without the need to be bothered with wires. 
Consequently, users who want to surf or browse news and information on the Internet, simply carry a PDA (pocket digital assistance) or Wi-Fi enabled laptop to a place where there is an access point or hotspot. The proliferation of hotspots in such places-which was built by telecommunications operators, Internet service providers even viduals triggered the second factor, namely because of the relatively low cost of construction or just around 300 dollars the United States. Increasing the quantity of Internet users based on Wi-Fi technology which is increasingly implicated in various parts of the world, has been pushing Internet service providers (ISPs) to build hotspots in major cities of the world. 
Wi-Fi (Wireless Fidelity) is a wireless connection such as mobile phones using radio technology, so users can transfer data quickly and safely. Wi-Fi not only can be used for internet access, Wi-Fi can also be used to create a wireless network in the company. Because of that many people associate with the Wi-Fi? Freedom? because the Wi-Fi technology gives freedom to users to access the internet or transfer data from the meeting room, hotel room, campus, and the cafĂ© are marked? Wi-Fi Hot Spot ?. Also one of the advantages of Wi-Fi is the speed that is several times faster than the fastest cable modem. Wi-Fi so users no longer have to be in the office to work. 
But Wi-Fi is only accessible by a computer, laptop, PDA or Cellphone that has been configured with Wi-Fi certified radio. For Laptops, users can install a Wi-Fi PC Cards that form in the PCMCIA card slot you have available. For PDAs, users can install the Compact Flash format Wi-Fi radio in the slot you have available. For users who are computer or PDA - is using Windows XP, simply by plugging the card into an available slot, Windows XP will automatically detect the area around you and look for a Wi-Fi network that is closest to you. It is very easy to find signs of whether the device has a Wi-Fi facility, that is by looking at the Wi-Fi CERTIFIED logo on the packaging. Although Wi-Fi is accessible only place that was marked? Wi-Fi Hotspot ?, number of public places that offer? Wi Fi Hotspot? increases drastically. This is because the place maketh them as? Wi-Fi Hotspot? means their customers can access the internet, which means giving added value to customers. Wi-Fi service offered by each? Hots Spots? also varied, there are offers for free access as well as in the executive lounge service, there is required the wearer to become one of the ISP's customers offering free Wi-Fi and there is also a pre-paid card offers. Whatever your choice for how to access the Wi-Fi, the most important is the presence of Wi-Fi, you can work anywhere and at any time until you do not need to be always confined in your work space to complete each job. 
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