This document discusses Wi-Fi technology. It begins by defining Wi-Fi as a wireless networking standard that allows devices to connect to the internet and each other without cables. It then discusses some of the key benefits of Wi-Fi, such as freedom of movement and easier setup compared to wired networks. The document also outlines some disadvantages, such as slower speeds and security risks compared to wired connections. Finally, it provides examples of common uses of Wi-Fi technology and some health concerns raised by the electromagnetic radiation emitted by wireless devices.

1. Sumang Singha
VI-E, Roll No 31

2. Introduction
Wireless Technology is an alternative to Wired
Technology, which is commonly used, for connecting
devices in wireless mode.
Wi-Fi is a generic term that refers to the IEEE 802.11
communications standard for Wireless Local Area
Networks (WLANs).
Wi-Fi Network connect computers to each other, to the
internet and to the wired network.
Wi-Fi works on physical and data link layer.

3. Need of Wi-Fi
Technology
Freedom from wires!!

4. Purpose
 The purpose of Wi-Fi is to hide complexity by enabling
wireless access to applications and data, media and
streams.
 The main aims of Wi-Fi are:
 make access to information easier
 ensure compatibility and co-existence of devices
 eliminate complex cabling
 eliminate switches, adapters, plugs, pins and
connectors
Wi-Fi Technology

5. How a Wi-Fi Network Works

6. Devices & Components
PCI adapter
(inside)
USB adapter
(outside)
PCMCIA Card (Portables)
Wi-Fi Technology

7. Interference
Cardboard
Wood Paper
Electrical
Transformers
Microwave
Ovens
Fluorescent
Lighting
Firewalls
Wi-Fi Technology

8. Wi-Fi Technology
Wifi
Phones Wi-Fi Camera
Innovations

9. 9
Advantages
 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.
 Scaleable – Can be expanded with growth.
 Mobile Access – Can access the network
on the move.

10. 10
Disadvantages
 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.
 Compromising data.
 Denial of service.

11. 11
Uses of Wifi
1. Connecting to Internet
2. Turn Your Smartphone into a Remote Control
3. Send Documents to Your Printer from Any Computer
4. Forward Notifications from Your Smartphone to Your PC
5. Tether Your Smartphone to Your Computer for Internet
Anywhere
6. Share Files with Nearby Computers
7. Wirelessly Transfer Photos from Your Digital Camera
8. Many electronic devices use Wi-Fi due to its simple functions.
9. Companies use Wi-Fi to create wireless networks within their
company.
10.Phone companies such as use Wi-Fi Hot Spots for their users
to get free calling/internet access.
11.Gaming companies like Nintendo use Wi-Fi to synch their
products and to use global network usage

12. 12
Health Risks
1. Contributes to the Development of Insomn
2. Damaging to Childhood Development
3. Affects Cell Growth
4. Derails Brain Function
5. Reduces Brain Activity in Females
6. Neutralizes Sperm
7. May Impact Fertility
8. Provokes Cardiac Stress
9. Linked to Cancer?

13. 13
What Makes them
Dangerous ?
1.Wireless routers – as well as Bluetooth and
similar wireless systems – give off
electromagnetic radiation in the low-
gigahertz frequency. This level is considered
potentially dangerous to people.
2.The wireless signals can pass through walls.
3.. Most routers are not turned off at night, so
you are exposed 24/7.

14. 14
If you're not ready to completely get rid of wireless stuff, you can at least reduce
your family's radiation by:
• Tell your family to try to not use their cell phone: Put your cell phone in Airplane
Mode, or turn it off, then just turn it on to check messages or make a quick call, then turn i
back off. Keep it for emergencies. As long as your cell phone is on, it emits radiation
continually (to you and everyone within 10 feet of you), even when you are not actually
making a call.
• Children Should NEVER Use Cell Phones:
• Use a corded phone at home and at work
• Reduce or stop using other wireless devices
• Keep laptops away from the body and don’t use a laptop while it rests on the lap.
• Use your cell phone only where reception is good
• Keep your cell phone away from your body when it’s on
• Use safer headset technology

15. Thank
You