Wi-Fi was designed based on the IEEE 802.11 specification. Today there are four variations of 802.11, namely: 802.11a, 802.11b, 802.11g, and 802.11n. Specification b is the first product of Wi-Fi. Variation g and n is one product that has the most sales in 2005.
Specifications Wi-Fi | |||
Specification | Speed | Frequency Band | Match with |
| 11 Mb/s | 2.4 GHz | b | |
| 54 Mb/s | 5 GHz | a | |
| 54 Mb/s | 2.4 GHz | b, g | |
| 100 Mb/s | 2.4 GHz | b, g, n | |
In many parts of the world, the frequencies used by Wi-Fi, users are not required to obtain permission from local regulators (eg, the Federal Communications Commission in the U.S.). 802.11a uses a higher frequency and therefore a narrower coverage, others the same.
Wi-Fi version of the most extensive in the U.S. market today (based in IEEE 802.11b / g) operates at 2400 MHz to 2483.50 MHz. With so allows operation in 11 channels (each 5 MHz), 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 variant of communication and information technology that works on the network and device WLANs (wireless local area network). In other words, Wi-Fi is a certification trademark given to telecommunications equipment manufacturers (Internet) working in WLANs and the network's capacity to meet the quality required interoperasi.
Internet technology-based Wi-Fi built and developed in the United States a group of engineers who worked at the Institute of Electrical and Electronis Engineers (IEEE) technical standard based on numbered device 802.11b, 802.11a and 802.16. Wi-Fi devices are not only able to work on WLAN networks, but also on the Wireless network Metropolitan Area Network (WMAN).
Because of technical standards for devices with 802.11b WLAN devices intended for use in the 2.4 GHz frequency or frequencies commonly known as ISM (Industrial, Scientific and Medical). As for devices 802.11a technical standard and the 802.16 WMAN device designed for, or also called Wi-Max, who works at around 5 GHz frequency band.
The high public interest - particularly among the community of the Internet - using Wi-Fi technology because at least two factors. First, ease of access. This means that users in one area can access the Internet simultaneously without having to be bothered with cables.
Consequently, users who want to do surfing or browsing news and information on the Internet, just bring PDA (pocket digital assistance), or laptop capable Wi-Fi to the place where there is access point or hotspot.
The proliferation of hotspots in these places - which is built by telecommunications operators, Internet service providers and even private individuals - triggered a second factor, namely because construction costs are relatively cheap or 300 dollar range only the United States.
Increasing the quantity of Internet users based on Wi-Fi technology is increasingly menggejala in various parts of the world, has encouraged Internet service providers (ISPs) to build hotspots in major cities of the world.
Some observers have even predicted in the year 2006, there will be 800,000 hotspots in many European countries, 530,000 in the United States and one million in Asian countries.
The overall amount of income derived by the United States and European countries from the Internet-based business Wi-Fi technology by the end of 2003 was estimated at 5.4 trillion U.S. dollars, or an increase of 33 billion U.S. dollars from 2002
Wi-Fi version of the most extensive in the U.S. market today (based in IEEE 802.11b / g) operates at 2400 MHz to 2483.50 MHz. With so allows operation in 11 channels (each 5 MHz), 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 variant of communication and information technology that works on the network and device WLANs (wireless local area network). In other words, Wi-Fi is a certification trademark given to telecommunications equipment manufacturers (Internet) working in WLANs and the network's capacity to meet the quality required interoperasi.
Internet technology-based Wi-Fi built and developed in the United States a group of engineers who worked at the Institute of Electrical and Electronis Engineers (IEEE) technical standard based on numbered device 802.11b, 802.11a and 802.16. Wi-Fi devices are not only able to work on WLAN networks, but also on the Wireless network Metropolitan Area Network (WMAN).
Because of technical standards for devices with 802.11b WLAN devices intended for use in the 2.4 GHz frequency or frequencies commonly known as ISM (Industrial, Scientific and Medical). As for devices 802.11a technical standard and the 802.16 WMAN device designed for, or also called Wi-Max, who works at around 5 GHz frequency band.
The high public interest - particularly among the community of the Internet - using Wi-Fi technology because at least two factors. First, ease of access. This means that users in one area can access the Internet simultaneously without having to be bothered with cables.
Consequently, users who want to do surfing or browsing news and information on the Internet, just bring PDA (pocket digital assistance), or laptop capable Wi-Fi to the place where there is access point or hotspot.
The proliferation of hotspots in these places - which is built by telecommunications operators, Internet service providers and even private individuals - triggered a second factor, namely because construction costs are relatively cheap or 300 dollar range only the United States.
Increasing the quantity of Internet users based on Wi-Fi technology is increasingly menggejala in various parts of the world, has encouraged Internet service providers (ISPs) to build hotspots in major cities of the world.
Some observers have even predicted in the year 2006, there will be 800,000 hotspots in many European countries, 530,000 in the United States and one million in Asian countries.
The overall amount of income derived by the United States and European countries from the Internet-based business Wi-Fi technology by the end of 2003 was estimated at 5.4 trillion U.S. dollars, or an increase of 33 billion U.S. dollars from 2002
No comments:
Post a Comment