Phd thesis on wireless network security zone
The most widely used transmission support is radio waves. Wireless transmissions utilize the microwave click The exact frequency allocations are set by laws in the different countries; the same laws also regulate the maximum allotted transmission power and location indoor, outdoor.
Such a wireless radio network has a range of about 10— meters to 10 Km per machine, depending on the emission power, the data rate, the frequency, and the type of antenna used. Phd thesis on wireless network security zone different models of antenna can be employed: The other type of transmission support is the phd thesis on wireless network phd thesis on wireless network security zone zone. Infrared rays cannot penetrate opaque materials and have a smaller range of about 10 meters.
From the point of view of the physical layer, it defines three non-interoperable techniques: The achieved data rate is 1—2 Mbps. Phd thesis on wireless network security zone specification has given birth to a family of other standards: The data rate is 1, 2, 5 or 11 Mbps, automatically adjusted depending on signal strength.
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The transmission range depends on the data rate, varying from 50 meters indoor meters outdoor for 11 Mbps, to meters indoor meters outdoor for 1 Mbps; the transmission phd phd thesis on wireless network security zone on wireless network security zone is also proportional to the signal power. Another standard currently under development, IEEE It operates on frequencies from 10 to 66 GHz, and should ensure network coverage for several square /apa-dissertation-in-text-citation.html. From the IEEE Channel access techniques The crucial point phd thesis on wireless network security zone channel access techniques for wireless networks is phd thesis on wireless network security zone it is not possible to transmit and to sense the carrier for packet collisions at the same time.
The reception of a packet is acknowledged by the receiver to the sender.
If the sender does not receive the acknowledgement packet, it waits for a delay according to the binary exponential backoff algorithm, which states that the Contention Window size is doubled at each failed try. Unicast data packets are sent using a more reliable mechanism.
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If the source correctly receives the CTS, it sends the data packet. It defines two kinds of networks: It operates in the click Phd thesis on wireless network security zone band.
Bluetooth operates in the 2. For such characteristics and its low cost, Bluetooth is fit for small WPANs and is also employed to connect peripherals such as keyboards, printers, or mobile phone headsets. Bluetooth radio technology works in article source master-slave fashion, and each device can operate as master or as slave.
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