What is Wi-Fi Technology?
Wi-Fi is a popular technology in today’s world. It is the trending wireless technology which is increasing day by day. Typically, Wi-Fi is the acronym for ‘Wireless fidelity’. It is one of the major operating technology and was invented in Netherlands in 1981 by NCR co-operation. The main objective of this technology is to connect more devices over the network. It is used to transmit information between sender and receiver via two or more than two devices. Wi-Fi technology has been invented for mobile computing devices as well as laptops and tablets. Now, Wi-Fi technology is highly used by most of the smart operating devices along-with consumer electronics devices such as Mobile phones, Mac book, Laptops and Smart TV and digital cameras etc. Wi-Fi is one of the major types of wireless technology which is also known as Wi-Fi LAN (Local Area Network). Wi-Fi is a very high-speed internet connection which operates without the use of Wires or Cables. Wi-Fi technology operates on four major standards such as Wi-Fi-802.11a, 802.11b, 802.11g and Wi-Fi 802.11n. Nowadays, Wi-Fi technology operates on many public places such as Hotels, Cinema Halls, Cafeteria, Universities campuses along with Airports etc.
What are the Different topologies of Wi-Fi Technology?
Typically, Wi-Fi technology uses following types of topologies that plays a very important role in the working mechanism of the Wi-Fi technology. Topologies of Wi-Fi technology are outlined below:
- Peer to Peer topology (Ad-hoc Mode)
- AP based topology (Infrastructure Mode)
- Point to multipoint bridge topology.
Peer to Peer Topology: In this type of topology, Devices of Client within a network can communicate with each other in an effective manner. In this topology, AP is not required for data transmission. It is very useful in managing and setting up a wireless network effectively and quickly.
Infrastructure based topology: It is very widely used in the Wi-Fi technology. In this type, Communication can be made via the Access point. It uses a mobile station to communicate over the network with one or more than one devices.
Point to multipoint bridge topology: This topology is used in the Wi-Fi technology in order to connect the devices over the network in one to many forms. This topology is widely used to connect devices at multiple locations to a centralized location in an effective manner. PMP communication is used in several places such as IP telephony as well as wireless sites in an effective way.
Describe History of Wi-Fi technology?
The history of Wireless fidelity is very long as well as interesting. History of Wi-Fi starts in 1971, Where ALOHA net connected with the packet network of UHF in the Hawaiian Islands In the recent time ALOHA net along-with the ALOHA protocol was a part of the Ethernet and later both protocols are a part of the IEEE standard 802.11 protocols respectively.
As Vic Hayes is often called as the “father of Wi-Fi” technology Wi-Fi technology was completely established in NCR co-operation under the guidance of Vic Hayes in 1974. Nowadays, NCR co-operation is a part of a prominent semiconductor components maker agree on systems.
In 1985, U.S federal Communication Commission released the ISM board for the un licenced use. This released ISM board consists of frequencies sets of 2.4 GHz which is the same used by many equipmentsuch as microwave ovens.
In 1991, NCR Co-operation with AT&T Co-operation invented the precursor to standard 802.11 that is intended for the use in cashier systems. The first wireless products were under the Wave Lan name so that they are the ones that credited Wi-Fi.
In 1996, CSIRO obtained valuable patents for a method use that is later used in the Wi-Fi to detect the signals in an effective manner.
The First version of 802.11 protocol was released in the year 1997 and this protocol provides link speed of 2Mbit/s. This protocol was enhanced in the updated version of 802.11b and it offers link speed of 11Mbit/s.
Establishment of Wi-Fi Brand and Trademark.
In the year 1999, Wi-Fi alliance was formed as a trade association to hold the Wi-Fi trademark under which most of the products are sold. The name Wi-Fi was used in the early August of 1999. As the alliance of Wi-Fi was coined by the brand-consulting firm known as Inter-brand.
The yin-yang Wi-Fi logo indicates the certification of the product.
Description of Wi-Fi Standards and Development History?
IEEE 802.11-1997 (802.11 legacy).
The actual version of the IEEE 802.11 standard was released in the year 1997 and justified in the year 1999. But it is obsolete now. The main objective of this protocol standard is to provide better techniques of error correction code. It offers link speed of 1-2 megabits/sec. This protocol standard runs on three layers such as physical layer technologies, Frequency hopping spread spectrum operating at 1Mbit/s. Direct sequence spectrum.
IEEE 802.11b (1999).
The updated version of the 802.11 is 802.11b and was released in the year 1999. It offers maximum data speed rate of 11Mbit/s and uses the same media access method as clarifies in the 802.11 protocol. Devices that are enabled with 802.11b standard protocol experience interference from other products operating at the frequency of 2.4 GHz.
IEEE 802.11a (2012).
This version of 802.11a was released in the year 2012. It offers high data rates of 54Mbit/s. This protocol standard uses the same datalink layer protocol as well as frame format as in the original standard. But an OFDM based interface operates on 5 GHz bandwidth.
IEEE 802.11g (2003).
This protocol was released in the year 2003. It is the third modulation standard that was ratified. The 802.11g protocol operates on a 2.4 GHz. bandwidth. But it uses same OFDM based transmission scheme as 802.11a uses. It executes on a maximum physical layer bit rate of 54 Mbit/sec.
More Standards are released and Clarified such as 802.11n (2009), 802.11ac (2013), 802.11 (2012) etc.
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