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Seminar presentaion


udit taluja

on 17 May 2012

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Transcript of Seminar presentaion

Submitted By: Steve Wilson
Udit Taluja The term Wi-Fi, first used commercially in August 1999, stands for Wireless Fidelity.
Wi-Fi gives the ability to wirelessly access a local area network and the Internet.
It is a group of standards for transmitting over a wireless network.
Originally designed to aid not replace wired networks. What is Wi-Fi To connect to a Wi-Fi LAN, a computer has to be equipped with a wireless network interface controller.
Communicates via electromagnetic radiation on either 2.4GHz or 5GHz (microwave band).
Each wireless device connects to a wireless access point (WAP) and can be up to 100m away for some WAPs.
Access the Internet by connecting the wireless access point to an Ethernet switch or directly to a router. How does it work Security Standards Cheaper deployment.


Wi-Fi Protected Access encryption (WPA2).

Quality-of-service (WMM).

Wi-Fi Certified.

Mobility. Advantages IEEE 802.11 define QoS, security, management, bandwidth, e.t.c

IEEE 802.11 standards
802.11a 5GHz 64Mbps
802.11b 2.4GHz 11Mbps
802.11g 2.4GHZ 54Mbps
802.11n 2.4GHz/5GHz 450Mbps

802.11n is able to use both bands simultaneously or be set to either.
Actual transfer rates are closer to half the given amount.
Wireless encryption standard is easy to break.

Wi-Fi network has limited range.

Internet connection speed of wireless network is lower than that of wired network

Maxiumum amount of connections in an area.
Disadvantages More vulnerable than wired connections.
IEEE 802.11 standards for security:
Very weak
Dynamic WEP
Unique keys, mutual authentication
WPA2 - current standard
Encryption and integrity in one key Wi-Fi Alliance http://www.wi-fi.org

Goleniewski, L 2007, Telecommunications Essentials Second Edition, Pearson Education, Inc, Boston. References Subject to security risks if wireless encryption is not enabled.
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