1. Name- Nazrin Parveen Roll no. 33

2. outline  What is Wi-Fi? What is Wi-Fi?  purpose purpose  Wi-Fi network elements Wi-Fi network elements  How a Wi-Fi network works How a Wi-Fi network works  Wi-Fi network topologies & security techniques Wi-Fi network topologies & security techniques  Advantages & limitations of Wi-Fi Advantages & limitations of Wi-Fi

3. What is Wi-Fi?  Wi-Fi means “Wireless Fidelity”.  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).

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 the following: 1. Make access to information easier. 2. Ensure compatibility and co-existence of devices 3. Eliminate cabling and wiring 4. Eliminate switches, adapters, plugs, pins and connectors.

5. Wi-Fi network elements:  Access point(AP)- The AP is a wireless LAN transceiver or “base station” that can connect one or many wireless devices simultaneously to the internet.  Wi-Fi Cards- They accept the wireless signal and relay information. They can be internal and external.  Safeguards- Firewalls and anti-virus software protect networks from users and keep information secure.

6. How a Wi-Fi network works  Basic concept is same as walkie-talkies.  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 the network wirelessly.

7. Wi-Fi network topologies  Service set Identifier(SSID)  Wired Equivalent Privacy(WEP)  IEEE 802.11i Wi-Fi security techniques  AP-based topology( infrastructure mode)  Peer-to-peer topology(Ad-hoc mode)  Point-to-multipoint bridge topology

8. Advantages  No wires- A truly wireless networking solution.  No worries- A wireless networking system that is secure, easy to manage, and built to grow with you.  No waiting- Fast, easy deployments. LIMITATIONS  Limited range  Data security risks: a huge challenge for Wi-Fi networks.  Interference from other devise; such as telephones, microwave ovens.