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• Wifi Technology
• Wi-Fi Technology
• Wireless Network
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INTRODUCTION TO Wi-Fi TECHNOLOGY.

Published by Samuel Shelton Modified over 10 years ago

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Presentation on theme: "INTRODUCTION TO Wi-Fi TECHNOLOGY."— Presentation transcript:

SEMINAR ON Wi-Fi.

Wi-Fi Technology.

Wi-Fi Technology ARTI J JANSARI M.E.(C.S.E.):-1ST (E.C.)

Computer Concepts – Illustrated 8th edition

Copyright 2001 – Wireless-Nets, Ltd.Page 1 Public Wireless LAN Hotspots Applications and Technologies September 27, 2001 Presented by: Jim Geier Principal.

1 Wireless LAN --which standard to follow? Avirup Dasgupta IT Department, Jadavpur University. Guide: Utpal K. Ray 29 th June,2004

A Wireless Local Area Network (WLAN) is a network that interconnects devices using radio waves. Wireless networking technologies allow devices to communicate.

How to Set Up, Secure and Manage A Network

Gold Country Computer Learning Center March 2006 Is Wireless for You? Roger Thornburn.

How does a network identify computers and transmissions?

Networks & Components Discuss the components required for successful communications Explain the purpose of communications software Identify various sending.

CY-SWR1100 Dual Band Wireless N Router

BZUPAGES.COM BSIT BZUPAGES.COM BSIT ON.

How To Set Up A Wireless Network Using A D-Link Wireless Router

Wide Area Wi-Fi Sam Bhoot. Wide Area Wi-Fi  Definition: Wi-Fi (Wireless Fidelity) n. – popular term for high frequency wireless local area networks operating.

Wireless Fidelity.  Short for wireless fidelity.  It is a wireless technology that uses radio frequency to transmit data through the air.  Wi-Fi is.

Presentation viewer : _ Mahmoud matter. Ahmed alasy Dr: Rasha Atallah.

BTT 101 / 2O1 Lesson 10 Dundas Valley Secondary Mr. Young.

1 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.

Wireless Security.

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• Wifi connections

Wifi Connections PowerPoint Templates & Google Slides Themes

Unlock your presentation potential: explore our collection of professionally crafted free and premium powerpoint templates and backgrounds for instant download, device connection powerpoint template, cellular network diagram, wireless powerpoint template, network development diagram, technology infographics, professional it services powerpoint template, nfc word cloud powerpoint template, technology network powerpoint template, download free and premium wifi connections powerpoint templates.

Choose and download Wifi Connections PowerPoint templates , and Wifi Connections PowerPoint Backgrounds in just a few minutes. And with amazing ease of use, you can transform your "sleep-inducing" PowerPoint presentation into an aggressive, energetic, jaw-dropping presentation in nearly no time at all. These from free or premium Wifi Connections PowerPoint Templates and Backgrounds are a great choice for a wide variety of presentation needs.

Our Free and Premium PowerPoint Templates are "pre-made" presentation shells. All graphics, typefaces, and colors have been created and are pre-set by an expert graphic designer. You simply insert your text. That's it!

Free vs. Premium Wifi Connections PowerPoint Presentation Templates

PoweredTemplate offers a wide range of free Wifi Connections PowerPoint Presentation Templates. You can find them by filtering by “Free”, from the “Filters” option on the site, on the top left corner of the screen after you search. This content is completely free of charge.

If you download our free Wifi Connections PowerPoint templates as a free user, remember that you need to credit the author by including a credits slide or add an attribution line “Designed by PoweredTemplate”, clearly and visibly, somewhere in your final presentation.

PoweredTemplate also offers premium PowerPoint templates, which are available only to Premium users. There is no difference in product quality between free and premium Wifi Connections PowerPoint Presentation Templates.

Best Wifi Connections PowerPoint Templates

Are you looking for professionally designed, pre-formatted Wifi Connections PowerPoint templates so you can quickly create presentations? You've come to the right place - PoweredTemplate has created these templates with professionals in mind. At PoweredTemplates, we understand how busy you are and how you love to save time.

That's why we've created a set of PowerPoint design templates with a Wifi Connections theme. These Wifi Connections PowerPoint templates are a great choice for a wide variety of presentation needs. Spend your time wisely - download the Wifi Connections PowerPoint Templates today.

Wifi Connections PowerPoint Presentation Themes FAQ

What are wifi connections powerpoint templates.

A PowerPoint template is a pattern or blueprint for your slides that you save as a .pptx or .potx file.

All the Wifi Connections PowerPoint templates are natively built in PowerPoint, using placeholders on the slide master, color palettes, and other features in PowerPoint, and can contain layouts, theme colors, theme fonts, theme effects, background styles, and even content (according to Microsoft Office).

How to choose Wifi Connections PowerPoint templates for presentations?

Choose after carefully studying the template features and viewing the big preview images. All the product information is on the product page in the description and a list of the features can be found in the horizontal scrolling bar under the Download button. You may download a few free templates before making the final decision.

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wifi technology - PowerPoint PPT Presentation

wifi technology

Facts about wifi – powerpoint ppt presentation.

• ROLL NO. 19 Onkar Singh Shekhawat
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• Intro to wifi
• Basic working of WIFI
• How WIFI works
• WIFI enabled devices
• IEEE 802.11 Standard
• Requirement of hardwares
• Area coverage by WIFI
• Short for wireless fidelity.
• It is a wireless technology that uses radio frequency to transmit data through the air.
• Wi-Fi is based on the 802.11 standard
• No Wiring system
• Radio Waves
• Two-way communication
• Computer Adapter
• Wireless Router
• Smartphones
• Printers etc.
• The IEEE 802.11 standard is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN).
• They are created and maintained by the IEEE LAN/MAN Standards Committee (IEEE 802).
• The base version of the standard was released in 1997.
• PCI Wi-fi Card
• USB Wireless Adapter
• Hub or Switch
• Wireless router
• Embedded systems
• Wi-Fi technology is used to provide Internet access to devices that are within the range of a wireless network that is connected to the Internet.
• The coverage of one or more interconnected access points (hotspots) can extend from an area as small as a few rooms to as large as many square kilometres.
• Freedom You can work from any location that you can get a signal.
• Setup Cost No cabling required.
• Flexibility Quick and easy to setup in temp or permanent space.
• Mobile Access Can access the network on the move.
• Speed Slower than cable.
• Range Affected by various medium.
• Travels best through open space.
• Reduced by walls, glass, water, etc
• Security Greater exposure to risks.
• Unauthorized access.
• Change the default network name in the access point.
• Change the default access point password.
• Center the access point in the middle of the building/house.
• Open the Settings app.
• Turn on WIFI radio .
• After turning on WIFI you see a list of networks .
• Choose any one from the list and
• Tap connect .
• If using a secured network then
• Provide proper password.
• Now Enjoy Browse Internet
• Tethering is when you turn your smartphone into a mobile Wi-Fi hotspot and share your phones 3G/4G data connection.
• Once you've turned tethering on,
• any device with a wireless connection can connect to the internet via your smartphone's connection.
• Now, the focus in wireless is shifting to wide area, i.e., WiMax and LIFI
• WiMax short for Worldwide Interoperability for Microwave Access.
• it is defined in IEEE 802.16 standards.
• It is designed to deliver a metro area broadband wireless access (BWA) service, and is being promoted by the WiMax Forum.
• WiMAX is quite similar to WiFi, but on a much larger scale and at faster speeds. 
• LiFi is a wireless optical networking technology ,
• that uses light-emitting diodes (LEDs) for data transmission.
•  LiFi is designed to use LED light bulbs similar to those currently in use in many energy-conscious homes and offices.
• Picture PICTURE
• WiFi is a freedom freedom from wires.
• It allows you to connect to the Internet from just about anywhere a coffee shop, a hotel room, or a conference room at work.
• it is almost 10 times faster than a regular dial-up connection.

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Powerpoint Templates and Google slides for Wifi

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This vector icon displays a computer with a red X over it, symbolizing the lack of an internet connection. Perfect for presentations on digital security, online safety, and the importance of reliable internet access.

This Monotone Powerpoint Icon is perfect for presentations without an internet connection. It features a laptop with a red line across the screen to indicate a lack of internet connection. Use this icon to quickly and easily communicate the concept of no internet to your audience.

This Monotone powerpoint icon is perfect for any presentation on WIFI security. It features a classic black and white design with a laptop and a router, making it ideal for any modern business presentation. It is easy to use and can be used to illustrate the importance of secure WIFI connections.

We are proud to present our 0814 wifi access point connected to mobile phone and laptop over wireless network ppt slides. This image slide displays Wi-Fi access point connected various technology devices. This image slide has been designed with graphic of wireless router, mobile phone, laptop and computer. This image slide depicts networking. You may change size, color and orientation of any icon to your liking. Use this PowerPoint template to express views on wireless networking in your presentations. This image may also be used in computer education presentations. This image slide will impart professional appearance to your presentations.

High-resolution images and the graphics. Edit the layout or the background of slide icons. Use of purposeful artwork in the slide icons. User-friendly when operated with the Google Slides. Indicating icons to fit in the presentation objective. Customize the background with your company’s brand name. Useful for the business professionals, managers and planners, marketing individuals.

Make your presentation profoundly eye-catching leveraging our easily customizable Wifi range monotone icon in powerpoint pptx png and editable eps format. It is designed to draw the attention of your audience. Available in all editable formats, including PPTx, png, and eps, you can tweak it to deliver your message with ease.

If you are looking for minimalistic icon designs, then this Wifi Internet Monotone Icon is an ideal choice. It features simple shapes with clean lines in order to help you make your point and stay classy. You can edit these graphics into something well-tailored that fits your business needs. You can also reproduce the PPT layout in JPG, PNG, PDF, and PPT formats to make a well-equipped presentation delivery.

Make your presentation profoundly eye-catching leveraging our easily customizable Internet with wifi signal tower monotone icon in powerpoint pptx png and editable eps format. It is designed to draw the attention of your audience. Available in all editable formats, including PPTx, png, and eps, you can tweak it to deliver your message with ease.

Presenting smartphone with online banking solutions and wifi ppt slides. This is a smartphone with online banking solutions and wifi ppt slides. This is a one stage process. The stages in this process are mobile, wireless, internet of things.

Instantaneous download in quick steps. Absolutely modifiable color, contrast, shape and orientation of PPT images. Insert your logo, brand name, trademark etc. to personalize. Add text suitable to the context with no worries about exhausting word limit. High resolution PPT infographics without pixelation when projected on wide screen. Totally compatible with Google slides and easily convertible to PDF or JPG format.

Jitter free running on compatible software. Convert to JPG and PDF formats. Pixelation nonexistent when viewed on widescreen format. Slides compatible with google slides. High resolution PPT graphics for better clarity. Additionally, add company logo, trademark, name without any issues. No space constraints when adding titles, sub titles. Useful in businesses, small and large, startups, social media organizations and more.

Presenting mf cloud service network and wifi connectivity database management flat powerpoint design. This Power Point template diagram has been crafted with graphic of cloud network and Wi-Fi connection diagram. This PPT diagram contains the concept of database management and networking representation .Use this PPT diagram for business and technology related presentations.

We are proud to present our wifi globe technical connection signals ppt icons graphics. Concept of global signal connectivity has been displayed in this power point template with four icons. This icon template contains the wi-fi antenna, globe and signal icons. Use this icon template for signal and antenna related topics in any presentation.

We are proud to present our tower no signal locked error in wifi ppt icons graphics. This power point icon template diagram has been crafted with graphic of four technical icons. Concept of no signal error and Wi-Fi connectivity has been displayed in this power point template. Use this icon template for internet and computer technology related presentations.

We are proud to present our mobile wifi satellite connection computer network ppt icons graphics. Graphic of mobile, Wi-Fi an satellite with computer network icons has been used to design this power point icon template. This icon template contains the concept of global satellite network. Use this icon template for mobile network and internet related presentations.

Presenting lock disc drive home page wifi ppt icons graphics. This Power Point icon template diagram has been crafted with graphic of lock disc, drive and home page with Wi-Fi icons. This PPT icon diagram contains the concept of data management and technology application Use this icon PPT diagram for web and software technology related presentations.

Presenting low beam antenna building antenna tower wifi ppt icons graphics. This Power Point icon template diagram has been crafted with graphic of low beam antenna, tower and Wi-Fi cons. This icon template contains the concept of Wi-Fi communication. Use this icon PPT for technology and communication related presentations.

We are proud to present our download folder wifi communication ppt icons graphics. This power point icon template has been crafted with graphic of folder and wi-fi icons. This icon template contains the concept of data download and upload. Use this icon template for data and communication related presentations.

We are proud to present our wifi phone smart phone laptop tablet ppt icons graphics. Graphic of wi-fi, smart phone and laptop with table icons has been used to design this power point template diagram. This icon template contains the concept of internet application and communication. Use this icon template for internet and mobile related presentations.

We are proud to present our wifi antenna satellite radar signals ppt icons graphics. Graphic of wi-fi antenna, satellite and radar signal has been used to design this power point template. This icon template contains the concept of global signal processing. Use this icon template for technology related presentations.

We are proud to present our wifi antenna refresh touch technology ppt icons graphics. Graphic of wi-fi antenna with touch icons has been used to design this power point icon template. This icon template contains the concept of communication and technology. Use this icon template for data management and communication related presentations.

This colourful PowerPoint icon is from the Smart Farm Eye collection. It depicts a modern farm with a watchful eye, representing the importance of monitoring and maintaining a healthy farm. Perfect for presentations on modern agriculture and the use of technology in farming.

This Monotone PowerPoint Icon is perfect for presentations on Smart Farm Eye technology. It features a modern, sleek design with an eye catching blue and white color scheme. It will help to illustrate the concept of Smart Farm Eye and is sure to impress your audience

This PowerPoint icon features a colourful illustration of a lock, symbolizing the security of a wireless network. It is perfect for presentations on WIFI security, data protection, and cyber safety. Use this icon to emphasize the importance of secure networks and data privacy.

This coloured PowerPoint icon offers a stunning visual representation of drone videos. Perfect for presentations, it features a high-quality image of a drone in flight with a vibrant blue sky background.

This monotone powerpoint icon is perfect for presentations related to drone videos. It features a black and white drone in the center of a circle, with a subtle gradient in the background. It is a great way to add a professional touch to your presentation.

This colourful PowerPoint icon is a great visual aid for presentations about Smart Farm Chip technology. It features a chip with a green background and a blue and white farmhouse, representing the connection between technology and agriculture.

This Monotone Powerpoint Icon is perfect for presentations related to Smart Farm Chip technology. It features a modern, sleek design that will enhance any presentation. Its high quality resolution ensures a professional look for any project.

This colourful PowerPoint icon is a great way to represent Smart Farm Cloud. It features a cloud with a farmhouse and a tractor, symbolising the connection between technology and agriculture. Perfect for presentations and other digital projects.

This Monotone Powerpoint Icon is perfect for presentations on Smart Farm Cloud. It features a high quality image of a farm with a cloud in the background, representing the connection of technology and agriculture. It is an ideal visual for any project related to modern farming.

This coloured PowerPoint icon features a smart farm drone, perfect for presentations on agricultural technology. It has a sleek design and vibrant colours, making it an eye catching addition to any presentation.

This Monotone PowerPoint Icon is a great visual representation of a Smart Farm Drone. It is perfect for presentations related to modern farming and agricultural automation. It is a high quality image with a clean, minimalist design.

This PowerPoint icon depicts a laptop with a green background, representing a Smart Farm. It is a great visual aid for presentations about the latest technology in agriculture, and how it can be used to improve farm productivity.

This Monotone Powerpoint Icon is perfect for presentations on Smart Farm technology. It features a modern laptop with a green background, ideal for conveying the concept of digital agriculture and the latest advances in technology. Its the perfect way to illustrate the modern farm and its potential.

This colourful PowerPoint icon is perfect for illustrating Smart Farm Strawberry topics. It features a cartoon strawberry with a green stem and a bright red body, making it an eye catching and memorable visual aid. Use it to enhance presentations, reports, and other documents.

This Monotone Powerpoint Icon depicts a strawberry farm, with a focus on modern technology and smart farming. It is a great visual aid for presentations on the future of agriculture, and the use of smart technology to optimize crop production.

This colourful PowerPoint icon is perfect for adding a creative touch to your social media photography. It features a vibrant design with a modern, minimalist feel that will make your images stand out.

This Monotone PowerPoint Icon is perfect for Social Media Photography. it is modern, sleek, and minimalistic design will make your photos stand out and draw attention. it is easy to use and perfect for all your creative projects.

This is a coloured powerpoint icon of a WIFI symbol with a red cross over it, indicating the WIFI is off. Ideal for presentations or documents related to technology, networks and internet security.

This Monotone PowerPoint icon is perfect for presentations that need to communicate the concept of WIFI Off. It features a simple, minimalistic design that is easy to recognize and eye catching. The icon is available in both vector and raster formats for easy use.

This coloured powerpoint icon is perfect for presentations and projects. It is a high quality graphic with a modern design that will make your slides stand out. It is easy to use and can be used to represent your WIFI connection in a visually appealing way.

This monotone powerpoint icon is a great way to quickly scan wifi networks and connect to the best one. It is easy to use and provides a secure connection for all your devices. It is a must have for any home or office.

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Nov 05, 2012

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WiFi. Is for “Wireless Fidelity” Or IEEE 802.11 Standard By Greg Goldman . What is the goal of 802.11 standard ?. To develop a Medium Access Control (MAC) and Physical Layer (PHY) specification for wireless connectivity for fixed, portable and moving stations within a local area .

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WiFi Is for “Wireless Fidelity” Or IEEE 802.11 Standard By Greg Goldman WiFi

What is the goal of 802.11 standard ? • To develop a Medium Access Control (MAC) and Physical Layer (PHY) specification for wireless connectivity for fixed, portable and moving stations within a local area. WiFi

802.11 sub-standards(amendments) …. • 802.11 MAC (Media Access Control) ratified 1999 • 802.11b PHY 2.4 GHz (max 11 Mbps) ratified 1999 • 802.11a PHY 5.0 GHz (max 54 Mbps) ratified 1999 • 802.11g PHY 2.0 GHz (max 54 Mbps) ratified 2003 • 802.11i Security draft number XXX • 802.11e QoS, Multimedia draft number XXX • 802.11h European regulations for 5GHz draft number XXX • 802.11h Japan regulations for 5GHz draft number XXX WiFi

Do I need any license to use 802.11 device ? • No , 2.4 GHz and 5.0 GHz are public available frequency !!! WiFi

Context with OSI layers WiFi

Logical Link Control Services WiFi

Standard 802.11 frame format WiFi

Frames types and subtypes • Three types of frames: • Control (ACK,RTS,CTS ,Power Save …) • Management (Beacon,Probe Request ,Probe Response, Association request , Association response …) • Data (Data, Null Data, Data_CF_Ack , ….) WiFi

802.11 MAC – Configuration summary – Infrastructure model • Infrastructure Model includes: • (most common) • Stations (STA) • any wireless device • Access Point (AP) • connects BSS to DS • controls access by STA’s • Basic Service Set (BSS) • a region controlled by an AP • mobility is supported within a single BSS • Extended Service Set (ESS) • a set of BSS’s forming a virtual BSS • mobility is supported between BSS’s in an ESS • Distribution Service (DS) • connection between BSS’s BSS2 ESS1 DS AP2 AP3 AP1 STA3 STA1 BSS3 BSS1 STA2 WiFi

The 802.11 MAC supports infrastructure and ad hoc network models • Ad Hoc Model includes: • Stations (STA) • any wireless device • act as distributed AP • Independent Basic Service Set (IBSS) • BSS forming a self contained network • no AP and no connection to the DS STA1 STA3 STA2 IBSS WiFi

Two types of access to air • DCF (distributed coordination function ) means everybody can speak and try to get air : 100% on the market • PCF (point coordination function) means ONE point coordinator (BOSS) who will allowed you to speak (like in bluetooth) WiFi

Summary of required features and difficulties vs 802.11 features • Features • High speed operation (PHY only) • Fair access (DCF, PCF) • Time-bounded access (PCF) • Flexible configuration (BSS, IBSS) • Security (WEP) • Mobility support (ESS) • Low power (PS) • Difficulties • Hidden terminals (RTS/CTS) • Capture (CSMA/CA, ACK) • Noise and interference (ACK, frag) • Limited spectrum (licencing, PHYs) WiFi

The 802.11 MAC basic Distributed Co-ordination Function (DCF) accessscheme uses a CSMA/CA based protocol • If the STA detects the medium is busy when attempting to send a packet then: • the STA starts a random back-off timer • the randomisation parameters depend on previous transmission successes/failures • the back-off timer runs once the medium has been idle for an IFS period • An STA may transmit a packet after sensing the medium is idle for an Inter FrameSpace (IFS) period • the back-off timer suspends when the medium is busy and does not restart until medium is idle for an IFS period • The STA may transmit when the back-off timer expires • The state (busy or idle) of the medium is determined using: • physical carrier sense • virtual carrier sense, based on reservations in received packets. These reservations set the NAV timer. The medium is considered busy until the NAV timer expires WiFi

The 802.11 MAC basic Distributed Co-ordination Function (DCF) access scheme uses a CSMA/CA based protocol Medium busy Contention window Send frame IFS IFS Busy Frame Defer access while busy and for an IFS period Decrement back-off when medium idle for at least IFS period WiFi

Acknowledgment WiFi

Security • WEP ( wired equivalent privacy) 64/128 bits Using RC4 algorithm, almost permanent key, very week security, able to crack by collecting statistic Current security level for 99.9% products on the market. • TKIP (temporal key integrity protocol ) Used RC4 algorithm with with a 128-bit "temporal key" but changes temporal keys every 10,000 packets and key dependes on address and sequence number. Will be required to obtain WiFi certification from 09/01/03 • AES (Advanced Encryption Standard ) New, much more stronger encryption, protect against hacker frames in insertion. Need hardware accelerator. Optional feature. WiFi

Why do we need 11A/11B/11G ? • 11B: 2.4 GHz , CCK modulation Rates from 1 to 11Mbps , on market from 1999 • 11A: 5.0 GHz , OFDM modulation Rates from 6 to 56 Mbps , on market from 2002 • 11G: 2.4 GHz, CCK+OFDM modulation Rates from 6 to 56 Mbps, on market from 2003 and … most popular today !!! Advantages of 2.4 GHz PHY: Low frequency, better wall penetration, less sensitive to multipath 3 not-overlapped channels Advantages of 5.0 GHz PHY: Less devices on the market (no microwave, no blue tooth …) 8 not-overlapped channels Range: almost the same … WiFi

802.11 a/b/g performance11A/G max throughput ~22 Mbps , not 54 Mbps (!!!)11B max throughput ~6 Mbps WiFi

Wlan market Scenarios WiFi

IEEE 802.16 for MAN==Metropolitan Area NetworkNew alternative to DSL/Cable modems • IEEE 802.16 Progress • Work on 802.16 started in July 1999. Four years into its mission, the IEEE 802.16 Working Group on Broadband Wireless Access has delivered a base and three follow-on standards. • IEEE 802.16 (“Air Interface for Fixed Broadband Wireless Access Systems”) was approved in December 2001. This standard is for wireless MANs operating at frequencies between 10 and 66 GHz. • IEEE 802.16.2, published in 2001, specifies a “recommended practice” to address the operation of multiple, different broadband systems in the 10-66 GHz frequency range. • In January of this year, the IEEE approved an amendment to 802.16, called 802.16a, which adds to the original standard operation in licensed and unlicensed frequency bands from 2-11 GHz. • 802.16c, which was approved in December 2002, is aimed at improving interoperability by specifying system profiles in the 10-66 GHz range. WiFi

802.11/802.16 WiFi

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How-To Geek

Virtual powerpoint presentations don't have to be boring: 7 ways keep people engaged.

Don't create "just another" virtual PowerPoint. Entertain your audience with an engaging presentation.

Quick Links

Add interactive in-slide features, embed your webcam, choose your layout carefully, limit your animations, use live chat (and have a moderator), pre-record your presentation, have a backup plan.

With online conferencing the twenty-first-century norm, you might find yourself creating and presenting a virtual PowerPoint presentation. You may well be used to delivering a slideshow to a live audience, but you can face a completely different set of challenges when doing this online.

The biggest difference between in-person and virtual presentations is that you're less likely to be able to read people's body language or glean verbal feedback when presenting online, so it can be more difficult to adjust your tone or pace accordingly. Your audience might also be more easily distracted by the dog barking in the background or a child running through the room, so you have to use methods that are more likely to keep your audience engaged.

As someone who led a school's English Department through the pandemic, I'm all too used to staring at my camera in the hope that my colleagues haven't zoned out, so I'd like to share some tried and tested ways to make virtual PowerPoint presentations at least a little more gripping.

One way to engage your virtual audience is to get them to interact directly with your PowerPoint presentation . Two examples that work for me are adding a QR code and including a countdown timer.

QR codes are a great way to direct your audience to a website or quiz. On Microsoft Edge, right-click anywhere on a web page where there isn't already a link, and left-click "Create QR Code For this Page." You can then copy or download the code to wherever you like in your presentation.

People like using their phones, so even if you can't see your audience, it's a safe bet that as soon as you direct them to scan a QR code with their camera, they'll engage straightaway. If the QR code directs people to a quiz-building website, such as Google Forms or SurveyMonkey, you can use this as a way to check if your audience has been listening!

Countdown Timer

In any situation, it's human nature to feel the pressure of a countdown timer. Countdown timers are a really effective way to maintain your audience's attention , as people will naturally keep checking back in with your PowerPoint slide to see how long they have left to do whatever you've tasked them to do. They're also a handy way to let your audience know when you plan to move on to the next slide in your presentation, serving as a clear boundary marker.

To create a countdown timer, you need to add the Disappear animation to text boxes or shapes containing your countdown numbers , adjusting the timing to one second for each.

Another reason a virtual audience might be less engaged is that, to them, seeing the presenter and their expressions is as important as reading the content of the slides. PowerPoint recognizes this, which is why they have the Cameo tool that lets you embed your webcam into your slideshow .

Providing you or your organization are subscribed to Microsoft 365, using Cameo is very straightforward. Simply type Cameo into your PowerPoint search box at the top of your window, and choose from the options there. To keep your webcam visible throughout your presentation, click "All Slides."

If you go down this route, make sure you avoid placing a prominent light directly behind you (otherwise, you'll just appear as a silhouette!), and make a conscious effort to repeatedly look at your camera directly as often as you can.

If you are creating an in-person PowerPoint presentation that will be beamed onto a large projector screen, you can afford to have smaller fonts and more writing on your slides. However, when you're running a virtual presentation, it's worth remembering that some people may well be viewing it on a mobile device with a small screen.

As a result, if you have lots of diminutive text on your slides, you're more likely to frustrate and, ultimately, disengage your audience. As a rule of thumb, I try to avoid using anything smaller than a size-40 font in a virtual presentation, and I also make every effort to have no more than four lines of text on each slide.

As well as adapting your layout to suit the virtual setting, also consider reducing the number of fancy animations in your slideshow.

As you're streaming your presentation over the internet, you can't rely on your viewers to have a strong connection and a decent device. An animation that appears to last a second on your screen can be jumpy and take longer on someone else's, resulting in a laggy presentation that looks unprofessional.

Regardless of whether you're presenting in-person or online, it's always a good idea to reduce the number and variety of animations you use in PowerPoint. That's not to say you shouldn't use any animations at all—after all, you are trying to keep your viewers engaged—but sticking to the Fade entrance animation will help you to make sure your presentation isn't a visual overload for your audience, doesn't experience jumpiness, and looks professional.

One of the most frustrating barriers to a successful virtual presentation is having people interrupt each other—not least when people try to jump in over you , the presenter. Similarly, that annoying two-second delay often causes awkward and unwanted speech overlaps.

Most videoconferencing platforms, including Microsoft Teams and Google Meet, let you stream your PowerPoint presentation within the call and have a live-chat facility at the same time, and you can make use of this feature so that your session runs as smoothly as possible.

When creating your PowerPoint presentation, plan in some time for you to address written comments that your audience is adding to the live chat as you present.

By doing this, you're giving your viewers the opportunity to ask questions, something that is often lost in virtual presentations, while also helping yourself to stay focused and finish whichever segment of your slideshow you are currently presenting.

Even better, if you are able to recruit a moderator, they can answer the typed questions for you within the chat as the presentation is ongoing, so you can just focus on giving an excellent presentation.

Are you presenting a particularly difficult topic? Or is it that you're simply not the most confident of presenters? One way to overcome these potential pitfalls is to pre-record either your whole presentation or even just the more complicated parts.

To do this, click "Record" in the top-right corner of your window, and when you finish, your slides and voiceover will be saved as an MP4.

You can then play the video or videos of your presentation during your video conference, pausing when necessary to answer any questions or elaborate on one of your points. Using this method will mean you can rehearse and perfect your slideshow, keeping your viewers engaged as a result.

We at How-To Geek know all too well about the unreliability of technology, and things always seem to go wrong at the most inconvenient moments. Even if you have perfected your PowerPoint layout and rehearsed its content to death, you should always have a backup plan in case things go awry.

Before your meeting begins, send the PowerPoint file to your viewers, and print off a copy of the slides for you to have by your side. This way, if your PowerPoint glitches for any reason, you can instruct your audience to open their copy of the presentation, and you have your notes ready to go so you can carry on from where you left off.

Many people make the same mistakes in their PowerPoint presentations, regardless of whether they're designed for a virtual or in-person meeting. Make sure you check out our top tips to avoid making these mistakes and impress your audience with the perfect slideshow.