How a wifi network works a wifi hotspot is created by installing an access point to an internet connection. Wifi technology is a spectrum radio technology and ofdm radio technology therefore it is an alternate of wireless lan. Impact of wireless technology in the workplace small. Many devices use it, so the signals can become more. A hotspot is any location where wifi network access is made publicly available. There are two main advantages of using wireless technology for computer networks.
Wifi network connect computers to each other, to the internet and to the wired. The radio waves are keys which make the wifi networking possible. This document covers the basics of how wireless technology works, and how it is used to create networks. While the various wifi variants that have emerged from the. Cell phones provide an incredible array of functions. Whenever, a computer receives any of the signals within the range of a wifi network, which is usually 300 500 feet for antennas, the wifi card reads the signals and thus creates an internet connection between the user and the network without the use of a cord. It should support mobility, better coverage, power efficiency, reliability and most importantly security.
Lifi can transmit at multiple gigabits, is more reliable, virtually interference free and uniquely more secure than radio technology such as wifi or cellular. How wireless works users a user can be anything that directly utilizes the wireless network. Lifi can work indoors, outdoors, with the lights dimmed and is not strictly lineofsight technology. Although many have come and gone, bluetooth, a wireless.
Wifi is a wireless networking protocol that devices use to communicate without direct cable connections. Introduction wireless technology is an alternative to wired technology, which is commonly used, for connecting devices in wireless mode. An introduction to wifi wireless technology is very popular nowadays and you can get connected almost anywhere. The technology uses radio signals to transmit information between your wifi enabled devices and the internet, allowing the device to receive information. The original slotted papertape system had 88 different radio channelsone for each of the 88 keys on a piano. Apbased topology the client communicate through access point. Before you start proceeding with this tutorial, we are. A wireless station that functions as an access point must implement the four station services plus the distri.
The first wireless transmitters went on the air in the early 20th century using radiotelegraphy. Wifi is a high speed internet connection and network connection without use of any cables or wires. Your phone, smart watch, tablet, wireless headphones, or other device doesnt need to be plugged into the charger with a wire, but the wireless charger itself still has to be plugged into a wall outlet to function. From the users perspective, wifi is internet access from a wirelesscapable device like a phone, tablet, or laptop. Introduction to wireless technology the term wireless communication refers to the transfer of information using electromagnetic em or acoustic waves over the atmosphere rather than using any propagation medium that employs wires. It is interference with micro owns cordless phones and other appliance. The future of wireless technology is bright due to it being very cost efficient and very easy to use and the best part about it is you dont have to worry about being tangled up in wires. We have seen wireless technology in cell phones and radios.
In some cases, however, the user might not be human. The access point transmits a wireless signal over a short distance. Return from how does wireless technology work to the home page. For example, a business traveler accessing the internet from a public wireless lan at an airport is a user. Wifi technology wifi is stand for wireless fidelity is generic term that refers to ieee802. Forrester research, a company that focuses on the business implications of technology change, has reported that in a few short years, up to 95% of devices used to access the internet will be nonpc devices that use an embedded system. Wifi uses multiple parts of the ieee 802 protocol family and is designed to seamlessly interwork with its wired sibling ethernet. Future wireless technology also includes laser communications systems. These packets are also transmitted securely over wireless systems. As we know lifi technology is based on vlc principle. In this video, you will learn how wireless networking works and the basics of wifi. As modulation made it possible to transmit voices and music via wireless. Introduction to wireless networks when you invent a new network.
Wifi has been developed for mobile computing devices, such has laptops, but it is now. Where 4g uses frequencies below 6 ghz, newer 5g networks use shorter wavelength signals with much higher frequencies, in the range of 30 ghz to 300 ghz. You can build your own access point or router using dedicated hardware, like the alix and net servers that. Adding wifi to a computer one of the best things about wifi is how simple it is. Digital technology is used to convert data, such as short messages, email or digital pictures, into small packets of 0s and 1s. Many people also use wireless networking, also called wifi or 802. How wifi works up to a point, its quite possible to treat your wireless network as a set of black boxes that you can turn on and use without knowing much about the way they work. Wifi uses radio technology to transmit and receive data at high speed. As the wireless industry converts to packetbased networks, utilizing the same technology as the internet, wireless data services continue to expand. A wifi hotspot is created by installing an access point to an internet connection. Compatible devices can network through a wireless access point to each other as well as to wired devices and the internet. The latest technology is the 5g network, which promises even faster speeds and greater bandwidth compared with 4g while reducing interference with other nearby wireless devices.
Many new laptops already come with a wifi card built in in many cases you dont have to do anything to start using wifi. Wifi is primarily a local area networking lan technology designed to provide in building. Although bluetooth technology has become synonymous with headphones, its used for all kinds of wireless devices. Apr 29, 2020 wifi 6 is a wireless local area network wlan technology that is meant to operate in an office, a home, conference center, or other crowded public spaces. Jan 23, 2014 how a wifi network works 22 wifi technology 23. Chapter 1 connecting to your digital life in this chapter experiencing your congested, connected life now moving to the fast lane with 802. Wifi, in fact, is one of the easiest technologies that you will ever use. Defining lifi the term lifi, which is short for light fidelity, was coined by one of the pioneers in the technology, professor harald. Or, they can frequency hop rapidly between the different bands. There are three big differences between wifi radios and walkietalkies.
Jun 17, 2016 5g networks have been designed for a smart world such as smart cities, smart healthcare, transportation and most important idea of iot. Wireless charging technology has been around for more than 100 years, but its inclusion in devices such as apples new iphone line has given it new life. Wifi is the name given by the wifi alliance to the ieee 802. Technology is making rapid progress and is making many things easier. Workswireless technology connecting to the wireless network when you turn on your wireless phone, it searches for a signal to con. Introduction wireless is a term used to describe communications in which electromagnetic waves are used for communication purpose. Wifi and lifi are similar because both technologies are wireless, but also very different, because unlike wifi, which relies on radio waves, lifi uses visible light communication vlc or infrared and nearuv spectrum waves. When a wifi enabled device such as a pocket pc encounters a hotspot, the device can then connect to that network wirelessly. It is a completely different technology that uses a. In terms of the osi reference model, the radio signal operates at the physical layer, and the data format controls several of the higher layers. The word wifi is actually a brand name that was introduced by a brand consulting firm for the underlying technology, which had a rather complex name. In the future wifi will be used by cars in highways in support of an intelligent transportation system to increase safety, gather statistics, and enable mobile commerce ieee 802. Asking a bartender for the password to the ieee 802.
You connect to the cloud the internet for everyday tasks such as working, searching, and shopping. There are two types of wifi signal, based on the frequencies they use. Current wifi systems support a peak physicallayer data rate of 54 mbps and typically provide indoor coverage over a distance of 100 feet. We use it for networking because it is cheaper and more flexible than running cables. The different versions of wifi are specified by various ieee 802. It is also easy to add a wifi card to an older laptop or a desktop pc. A cell is typically the area several miles around a tower in which a signal can be received. This is similar to fiber optic communication which most would considered to be wired tech. An introduction to wireless technology articles yawarra. Introduction wireless technology linkedin slideshare. Wifi wireless technology working principles, types and.
Lifi technology is not a replacement of a widely used wifi technology. How wifi works like mobile phones, a wifi network makes use of radio waves to transmit information across a network. Uses frequency hop fh spread spectrum, which divides the frequency band into a number of hop channels. Lifi is a highspeed wireless communication technology that uses visible light presently using leds to transmit information. From the above, we can compare lifi vs wifi and following difference between lifi and wifi can be derived. Wireless technology is used in many types of communication. While wireless networks can be just as fast and powerful as wired networks, they do have some. Over the last couple of years, wireless fidelity or. Wifi is a technology that uses radio waves to provide network connectivity.
Over the past decade, wifiwireless networking has become very popular. Iberry wifi provides solutions for the wifi hotel hotspots, wifi. But this service was pretty expensive till 2002,however the new 802. And gets better over time with new features and improved performance. For example, most wifi networks operate in a special band of radio frequencies around 2. In theory, the same method could be used for voice and data communication as well as guiding torpedoes, but in the days of vacuum tubes, paper tape, and. Some functions of a wlan require central coordination. With a workplace equipped with wireless lan connectivity, employees can move around the office space without any restrictions arising from cables. Wifi is a registered trademark of the wifi alliance. The deve lopment of this technology began in 1997, when the institute of electrical and electronic engineers ieee introduced the standard 802. How bluetooth wireless technology works bwtenabled devices operate in the unrestricted 2. Its an industry term that represents a type of wireless local area network lan protocol based on the 802.
The wireless network is operating three essential elements that are radio signals, antenna and router. A connection is established using a wireless adapter to create hotspots areas in the vicinity of a wireless router that are connected to the network and allow users to access internet services. New networks will offer even greater speeds, equivalent to dsl and beyond. Note that wifi is actually a wireless brand owned by the wifi alliance, which is a nonprofit organization that promotes wifi technology and wifi products. Bwtenabled devices use seventynine 1megahertz frequencies from 2. Thus, it works much like your personal computer does to send and receive information. See below for a comparison of the common wireless standards. Jul 03, 2018 wifi pronounced whyfy is a term that was coined by a branding company in 1999 as a name which would be easily recalled, due to its similarity to the then wellknown term hifi. Wifi radios can transmit on any of three frequency bands.
Most modern devices support wifi so that the devices can access a network to gain internet access and share network resources. Apbased topology infrastructure mode peertopeer topology adhoc mode. Jul 20, 2015 in common usage, the term wifi stands for wireless fidelity. Thats the way most people relate to all of the technology that surrounds themyou shouldnt have to worry about the 802. Wifi is a generic term that refers to the ieee 802. Bluetooth technology is a shortrange wireless communications technology to replace the cables connecting electronic devices, allowing a person to have a phone conversation via a headset, use a. Stream video, get work done, or swipe right in any room not just next to your router. Antennas work stronger and have a longer radio transmission with a. When wifi enabled device encounters a hotspot the device can then connect to that network wirelessly. A wireless phone is actually a computer connected to a radio. They work in perfect unison to deliver hyperfast, superstable wifi to every square foot. But, instead, laser communication, which is here now, and involves using a beam of intense light through space, will only continue to expand in the future. If youve been in an airport, coffee shop, library or hotel recently, chances are youve been right in the middle of a wireless network.
To make use of a wireless network, youll need wireless capable computers and devices such as wireless access points or wireless routers. Wifi technology, what is wifi technology, wireless fidelity. An aim of this page and the website is to provide easytounderstand information in one place and to deepen your understanding of the how does wireless technology work in a particular topic, when you need it. Technologies that started from humble origins, such as ofdm used in the 1980s for digital broadcasting, have been stretched to new limits and combined with other concepts, so that ultra wideband uwb. Lifi technology for light fidelity is a new method to connect wirelessly mobile devices and other connected devices using led lights. By using this technology we can exchange the information between two or more devices. This will help the reader to understand the difference between lifi and wifi in more detail.
The network structure includes the wireless network interface adapters and base stations that send and receive the radio signals. Obviously, the wifi alliance wanted something more catchy than a name that most regular users wouldnt ever get a hang of. Supports up to 8 devices in a piconet two or more bluetooth units sharing a channel. It has many advantages such as flexible, responsive, customized, fast, costeffective, secure. This provides a focus for the work of equipment developers and service providers and is as much a contributor to the growth of wireless networking as the power of the underlying technologies. One of the biggest advantages of wireless networks is its ability to fuel increased mobility in businesses. There is an emphasis on security issues and the available security protocols. The wifi security methods includemac id filtering,static ip addressing and wep encryption. When building a network, you will be using wifi technology, which has some unique characteristics you will need to know. When a constant current is applied to an led light bulb, a constant stream of photons are emitted from. Jul 15, 2015 wifi works off of the same principal as other wireless devices it uses radio frequencies to send signals between devices. Wifi has quickly grown to become the dominant wireless lan standard.
In order to handle higher network demands, the network must be smart, efficient and cost effective. In exploring the possibility of alternatives, one such alternative tapped to replace the prevailing wifi technology is lifi. Lifi is a wireless technology holds the key to solving challenges faced by 5g. The radio frequencies are completely different say from walky talkies. Wifi allows lans to be made without cabling for client devices, typically reducing the costs of. Oledcomm used a lifienabled lightbulb to transmit data at speeds as fast as 1 gigabits per second gbps. Cellphone technology wireless phones which receive their signals from towers. Wireless technology in the workplace powers the concept of a mobile workforce. Technology purelifi welcome to immersive connectivity. The major advantage of wifi is that it is compatible with almost every operating system, game device, and advanced printer. Ppt wifi technology powerpoint presentation free to. Not requiring an explicit network of wires and permitting communication while on the move.
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