Dr.COM Campus Wi-Fi and Wired Broadband Service Presentation 201502
Wi fi presentation
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Transcript of Wi fi presentation
Presented by
WUSL (2010-2011 batch)
Wi-Fi Introduction Scope of Wi-Fi Working principle Products Building a Wi-Fi Network Wi-Fi Security
Agenda
Wireless Fidelity (Wi-Fi)Welcome to the World of Wireless
A radio technology that networks the devices.
Refers to wireless LAN products based on the IEEE 802.11g specification
Provides easy connections to the internet and business networks while traveling
The main attractive feature of this technology is that it can provide wireless broadband connection within a specific geographic boundary.
In few more years all electronic devices are going to have a built in Wi-Fi..
So once again we welcome to World of wireless. Many colleges and businesses have suitable building layouts that can be wireless to build a unwired network. Wi-Fi is a very cost effective alternative in
these environments.
SCOPE OF Wi-Fi
Operating modes
Infrastructure Mode
AD HOC Mode
Building a WiFi
A Wi-Fi hotspot is created by installing an access point to an internet connection.
An access point acts as a base station.
When Wi-Fi enabled device encounters a hotspot the device can then connect to that network wirelessly.
A single access point can support up to 30 users and can function within a range of 100 – 150 feet
indoors and up to 300 feet outdoors.
Many access points can be connected to each other via Ethernet cables to create a single large network.
Wireless Local Area Networking
The Beat Goes on..
Locating Hotspots
There are many Wi-Fi hotspots now available in public places like
restaurants, hotels, libraries and airports. For example, Katunayake Airport, The number of hotspots in the
world is growing daily.
Wi-Fi TopologiesAP Based TopologyPeer to peer TopologyPoint to multi-point bridge Topology
The client communicates through Access Point.
It connects the PC’S by an AP. It consists of 2 or Base Stations. It includes 10-15% overlap to allow roaming.
AP-based topology
Peer to peer Topology
Access Point is not required. Client devices within a cell can
communicate directly with each other.
It is useful for setting up of a wireless network quickly and easily.
Point-to-multipoint bridge topology
Used to connect a LAN in one building to a LANs in other buildings even if the buildings are miles apart.
Range varies based on the type of wireless bridge and antenna used as well as the environmental conditions.
Wireless FidelityAdvantages
Can be used in Mobile. Widely available in public
venues. Relatively inexpensive. Easy to set up a network. User-friendly software. Security features. Global set of standards.
DisadvantagesSpectrum assignments & operational limitations
Power consumption is fairly highDegradation in performanceNetworks have limited rangeUsed to steal personal and confidential information
WEP stands for Wired Equivalency Privacy
As its name implies, this standard was intended to make wireless networks as secure as wired networks.
The common key lengths are currently 128- and 256-bit.
WPA Wi-Fi Protected Access is an early version of the 802.11b security standard that was developed by the Wi-Fi Alliance to replace WEP.
Wi-Fi Security
A SPECIAL SECURITY SOFTWARE
Wi-Fi Cameras used in BANKS
Conclusion
“Things that think…
don’t make sense unless they link.”