18-01-2013, 04:15 PM
Wireless Communications and Wireless Networks
Wireless Communications.ppt (Size: 949.5 KB / Downloads: 27)
WIRELESS
Any type of electrical or electronic operation accomplished without use of wires
Wireless connections use air to connect sending and receiving devices
Channel is a division in transmission medium
WIRELESS COMMUNICATION
Communication networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves
Wireless communication may be via:
Radio frequency communication
Microwave communication
Infrared short range communication
How are WLANs Different?
They use specialized physical and data link protocols
They integrate into existing networks through access points which provide a bridging function
They let you stay connected as you roam from one coverage area to another
They have unique security considerations
They have specific interoperability requirements
They require different hardware
They offer performance that differs from wired LANs.