Wi fi - Technology @ IEEE Concept
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Wi-Fi (Wireless Fidelity) allows devices to connect to the internet and networks without physical connections using radio technology defined by the IEEE 802.11 standards. It provides wireless broadband access within a specific range, with many access points able to connect multiple users across a large area. While convenient, Wi-Fi networks face security challenges that techniques like WEP, WPA, and dedicated security software aim to address. Their capabilities are also limited by factors such as interference, but new standards seek to improve speed, range and other advantages over wired networks.
Wi fi - Technology @ IEEE Concept
- 1. Presented by Kodela. Jagadeesh Is for “Wireless Fidelity” Or IEEE 802.11 Standard
- 2. Vic Hayes Popularly known as the “Father of Wi-Fi,” Vic Hayes is senior research fellow at Delft University of Technology in Delft, Netherlands. From its inception in 1990 through 2000.Mr.Hayes horned by IEEE Institute of Electrical and Electronics Engineers Charles Proteus Steinmetz Award in 2007.
- 3. Wi-Fi Introduction Working principle Products Building a WiFi Network Wi-Fi Security Scope of WiFi Difficulties Vs Features Advantages in New 802.16 Comparison between 3G & 802.16 Agenda
- 4. 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 802.11b 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.
- 5. Operating modes Infra Structure 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.
- 7. A Way to Amplify WiFi Signals A WiFi repeater is installed to extend coverage.
- 8. Wireless Local Area Networking
- 9. WiFi Topologies • 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
- 10. 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.
- 11. 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.
- 12. Wireless Fidelity Advantages Mobile. Widely available in public venues. Relatively inexpensive. Easy to set up a network. User-friendly software. Security features. Global set of standards.
- 13. 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 802.11i security standard that was developed by the Wi-Fi Alliance to replace WEP. Wi-Fi Security
- 15. December 17, 2014 15 A SPECIAL SECURITY SOFTWARE
- 16. Wi-Fi Cameras used in BANKS
- 17. 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
- 18. 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 (licensing, PHYs)
- 19. Advantages in New 802.16 Comparison to 802.11/802.16
- 22. Wi-Fi is a simple, cost-effective way to connect to the Internet, without the need to physically connecting wires. In 1997 IEEE drafted the 802.11 standard for wireless local area networking. Hotspot is a geographic area setup in any public location, and has a readily accessible wireless network. Security is a huge challenge for Wi-Fi Networks, many Security Techniques are used to improve it. Wi-Fi Networks have a several limitations that should be concerned. Conclusion