Wi fi presentation
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This document provides an overview of Wi-Fi technology, including its introduction, scope, working principles, and how to build a Wi-Fi network. Wi-Fi allows for wireless internet and network connectivity within a specific geographic area using radio waves. Common components of a Wi-Fi network include access points that act as base stations to connect wireless devices to the internet or a larger network within a range of 100-150 feet indoors. The document also discusses Wi-Fi security standards like WEP and WPA that aim to protect wireless networks, and examples of Wi-Fi usage in public places and businesses.
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Wi fi presentation
- 1. Presented by WUSL (2010-2011 batch)
- 2. Agenda Wi-Fi Introduction Scope of Wi-Fi Working principle Products Building a Wi-Fi Network Wi-Fi Security
- 3. 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.
- 4. SCOPE OF Wi-Fi 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.
- 5. Operating modes Infrastructure Mode AD HOC Mode
- 6. 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.
- 8. 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.
- 9. Wi-Fi Topologies AP Based Topology Peer to peer Topology Point to multi-point bridge Topology
- 10. AP-based 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.
- 11. 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.
- 12. 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.
- 13. Advantages 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.
- 14. Disadvantages Spectrum assignments & operational limitations Power consumption is fairly high Degradation in performance Networks have limited range Used to steal personal and confidential information
- 15. Wi-Fi Security 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.
- 17. A SPECIAL SECURITY SOFTWARE
- 18. Wi-Fi Cameras used in BANKS
- 20. “Things that think… don’t make sense unless they link.”