WLAN

WLAN is a wireless computer network that links two or more devices (using-spectrum or OFDM radio) within a limited area such as a home, school, computer laboratory, or office building.
WLAN is a marketed under the Wi-Fi brand name.
Wireless LANs have become popular in the home due to ease of installation and use.

1. Wireless Local Area Network

2. INDEX Introduction Advantages Disadvantages Types Of WLAN Practical Use Of WLAN

3. INTRODUCTION AND HISTORY OF WLAN What is WLAN? WLAN stands for Wireless Local Area Network. Sometimes it is also called Local Area Wireless Network (LAWN). Norman Abramson , a professor at the University of Hawaii, developed the world’s first wireless computer communication network, ALOHA net (operational in 1971). WLAN is a wireless computer network that links two or more devices (using-spectrum or OFDM radio) within a limited area such as a home, school, computer laboratory, or office building. WLAN is a marketed under the Wi-Fi brand name . Wireless LANs have become popular in the home due to ease of installation and use. INDEX

4. ADVANTAGES OF WLAN Installation flexibility . Reduced cost-of-ownership . Mobility INDEX

5. Installation speed and simplicity No cable to pull . Few transmitters/receivers for multiple for users . Reduced cost-of-ownership Mobile devices are less expensive than computer workstations. No need to build wiring closets . Mobility Access to real-time information. Provides service opportunities. Promotes flexibility. Supports productivity. ADVANTAGES[Conti…] INDEX

6. DISADVANTAGES OF WLAN Cost Environmental Conditions Less Capacity INDEX

7. DISADVANTAGES[Conti…] Cost Wireless network cards cost 4 times more than wired network cards. The access points are more expensive than hubs and wires . Environmental Conditions Susceptible to weather and solar activity. Constrained by buildings, trees, terrain . Less Capacity Slower bandwidth. INDEX

8. TYPES OF WLAN Infrastructure Peer-to-peer Bridge Wireless distribution system INDEX

9. Infrastructure Most Wi-Fi networks are deployed in infrastructure mode . In infrastructure mode, a base station acts as a wireless access point hub, and nodes communicate through the hub. The hub usually, but not always, has a wired or fiber network connection, and may have permanent wireless connections to other nodes . Wireless access points are usually fixed, and provide service to their client nodes within range. Wireless clients, such as laptops, smart phones etc. connect to the access point to join the network. TYPES OF WLAN[Conti…] INDEX

10. Peer To Peer TYPES OF WLAN[Conti…] Two PCs equipped with wireless adapter cards can be set up as an independent network whenever they are within range of one another . A peer-to-peer network allows wireless devices to directly communicate with each other. INDEX

11. Bridge A bridge can be used to connect networks, typically of different types . A wireless Ethernet bridge allows the connection of devices on a wired Ethernet network to a wireless network . The bridge acts as the connection point to the Wireless LAN. TYPES OF WLAN[Conti…] INDEX

12. Wireless distribution system A Wireless Distribution System enables the wireless interconnection of access points in an IEEE 802.11 network . TYPES OF WLAN[Conti…] INDEX

13. Corporate Education Finance Healthcare PRACTICAL USE OF WLAN INDEX

14. PRACTICAL USE[Conti…] INDEX Corporate Mobile networking for e-mail, file sharing, and web browsing . Education Connectivity to the University Network for collaborative class activities. Ability to access research sources without requiring a hard point.

15. Finance Traders can receive up-to-the-second pricing information. Facilitates electronic payments for goods and services. Improve the speed and quality of trades. Healthcare Emergency medical information readily available. Access to schedule information. PRACTICAL USE[Conti…] INDEX

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