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Outlines a Wireless Local Area Network

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Added on  2020-04-07

Outlines a Wireless Local Area Network

   Added on 2020-04-07

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Running head: WIRELESS NETWORKSAssignment [Student Name Here][Institution’s Name Here] [Professor’s Name Here][Date Here]
Outlines a Wireless Local Area Network_1
WIRELESS NETWORKS2Question 1The IEEE 802.11b outlines a wireless Local area network standard that defines both the MACand physical layers of wireless communication within the range of 300 meters. Now, its physicallayer unlike its counterpart IEEE 802.11a compromises of the following features and attributes:First, the 802.11b operates within the ISM frequency range which is outlined to start at2.4GHz and end at 2.4835GHz in the US[ CITATION Gei03 \l 1033 ]. In some countries, thisrange does change e.g. in Europe and Japan where it’s defined as 2.471 to 2.497 GHz.Secondly, its operational frequency bands are split into 14 partial channels thatcontinuously overlap having a width of 22MHz. Now, devices having the same basicservice set (BSS) operate within the same channel.The chip rate of the radio interfaces is 11MHz having different transmission rates (1, 2,5.5 and 11).Finally, the transmission rates are supported by direct sequence spread spectrum and thecomplementary code key modulation[ CITATION Koi06 \l 1033 ].IEEE 802.11aFirst and foremost, this standard uses the orthogonal frequency division multiplexing techniqueto facilitate its operations, which includes a data rate of 54Mbps and a frequency band of 5GHz.The standard also defines the operations of WLAN having several improvements as compared tothe original standard. Below are its physical layer attributes as compared to 802.11b:First, OFDM is used which is not a spread spectrum multiplexing technique[ CITATIONGei031 \l 1033 ].
Outlines a Wireless Local Area Network_2
WIRELESS NETWORKS3OFDM divides the communication signal into 48 different subsections across a 20MHzchannels. It has a data rate of 6, 12 and 24 MbpsFurthermore, it uses different modulation techniques depending on the data rate e.g. thebinary phase shift keying for 6Mbps and quadrature amplitude modulation for 54Mbps[ CITATION Gei031 \l 1033 ].Key differences802.11a802.11bOFDM technique Spread spectrumData rates of 6, 12 and 24 MbpsBased on the chip rates; 1, 2, 5.5 and 11 Mbpsdata ratesDifferent modulation techniques are used; BPSK and QAM.Spread spectrum and complementary code keyQuestion 2a. 802.11i is an advancement of the original 802.11 standard that addresses the securityshortcomings of WPA. Its authentication process incorporates WPA with WPA2 and AESencryption. Moreover, it introduces the structures of robust security network where a four-wayhandshake is used with a group key handshake. Furthermore, the extensible authenticationprotocol (EAP) is used as the defining protocol for the standard. This outline defines theauthentication of a client to a server[ CITATION Lat12 \l 1033 ].In all, the authentication process involves three elements supplicant (device requiringauthentication, client), the authentication server and authenticator (relay agent).Process:
Outlines a Wireless Local Area Network_3

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