Wi –Fi

Presented by:

SANDARSH SETHI

Definition:

Uses radio waves to provide Wireless High-speed Internet

Defines Wi-Fi as any "Wireless Local Area Network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards."

Trade mark:

• Uses radio waves to send signals to various devices.

• Convert the data into machine language

• Allows data to be sent very quickly

Working:

WiFi Hotspots:

Physical location that offers internet access over a wireless LAN

Found in coffee shops, hotels,

airports etc.

                             

                                                                                           

Types of hotspots:

Free hotspots

Commercial hotspots

Free hotspots:

Uses open public network

Wi-Fi router required

No control on router

Commercial hotspots:

Monthly or yearly subscription required

Any mode of payment could be used

May allow free access to certain sites

Travel netcon, esperto wireless are commercial hotspot provider companies

Wi –Fi Reach:

Wi-Fi networks have limited range.

Typical wireless router using 802.11b or 802.11g have a range of 32 m indoors and 95 m outdoors.

New IEEE 802.11n can exceed that range by more than double.

Wi-Fi in the 2.4 GHz frequency block has slightly better range than Wi-Fi in the 5 GHz frequency block.

Embedded systems:

Uses both hardware & software components

Wi-Fi availability in the home is on the increase.

Increasingly used for remote monitoring including security systems

Also used in hospitals

Long Distance 802.11 Wi-Fi – dish:

Operational advantages of Wi-Fi:

unmatched mobility & elasticity

can be expanded with growth

quick easy setup

lower total ownership cost

more faster & secure

Limitations of Wi-Fi:

Security concern

High power consumption

Interference from other devices

Scarcity of hot spots

Summary:

• Understand it• Plan it• Implement it• Use it• Refine it• Support it