Wireless lan (wlan)
A wireless local area network is typically referred to as a wireless Lan (WLAN). It uses radio frequency to connect computers and other devices. All communication pass through the network centrally located wireless access point.
radio frequency
radio frequency:
WLAN is also a flexible data communication system. WLAN technology is an alternative to theLAN that connects the building or campus. Options in WLAN technology are:
• Spread-spectrum technology (SST)
-Direct-sequence spread spectrum
-spectrum frequency hopping
• Narrow technology
-Send and receive user information in a specific radio frequency.
• Using infrared technology, the very high frequencies to carry data.
WLAN Configuration • Independent wlan (peer to peer) -The most simple wlan-Using the wireless adapter -Does not require administration or pre-configuration • Infrastructure WLAN -Multiple-Access Point (MAP) link the WLAN to the wired network -Multiple users can share network resources -Greater coverage.
WLAN applications can be used anywhere, such as:
- At the hospital, more productive
- Consulting / Account improve productivity
- University students - is easy to reach information
- Warehouse Worker - exchange of information in central database
- WLAN Frequency - 10 MHz to 300MHz
- Wide Coverage - 500 feet (indoors)
- 1000 Feet (Outside the building)
Network requirements:
- Hardware
- Access Point
- Antennas and bridges
- Wireless adapter
ADVANTAGES WLAN
- wiring for the LAN is no longer needed
- workers will be more productive
- Cost savings
- settings - diversity and topology enables application specific initialize combination when needed.
- Users outside the immediate area there is no coverage and broadcast Tues
- Security from hackers for both providers and users.
- wireless network is based on narrowband transport media. Wireless network operators need to optimize transportation solutions to customers to optimize service and the same bandwidth.
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