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Wireless Local Area Networks vs. 802.11b

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Added on  2020-03-16

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WIRELESS NETWORKS 7WIRELESS NETWORKS Wireless Networks 2013 Name of the Student Name of the University Author’s Note: Question 1 2 Question 2.a 3 Question 2.b 4 Question 3 5 Question 4 8 References 10 Question 1 Compare and contrast the inner workings of physical layers for 802.11b and 802.11a standards. In the physical layer of the Wireless Local Area Networks, the IEEE 802.11 has four distinct standards, which are known as the 802.11a, 802.11b, 802.11g

Wireless Local Area Networks vs. 802.11b

   Added on 2020-03-16

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Running head: WIRELESS NETWORKSWireless NetworksName of the StudentName of the UniversityAuthor’s Note:
Wireless Local Area Networks vs. 802.11b_1
1WIRELESS NETWORKSTable of ContentsQuestion 1........................................................................................................................................2Question 2.a.....................................................................................................................................3Question 2.b.....................................................................................................................................4Question 3........................................................................................................................................5Question 4........................................................................................................................................8References......................................................................................................................................10
Wireless Local Area Networks vs. 802.11b_2
2WIRELESS NETWORKSQuestion 1Compare and contrast the inner workings of physical layers for 802.11b and 802.11astandards.SolutionThe WLANs or the Wireless Local Area Networks with higher and greater speed areabsolutely famous or popular in each and every sectors in the world (Bayraktaroglu et al., 2013).These particular sectors are considered to be the most beneficial sectors in the society. The mostimportant standard for the Wireless Local Area Networks is known as the IEEE 802.11. Themost important aspect present in this particular standard is that this standard helps in thespecification of the MAC or medium access control and the physical layer for the Wireless LocalArea Networks. In the physical layer of the Wireless Local Area Networks, the IEEE 802.11 hasfour distinct standards, which are known as the 802.11a, 802.11b, 802.11g and 802.11n (Vinel,2012). The comparison and contrast between the two standards that is the 802.11a and 802.11bare as follows:Key Features802.11a802.11b1. Range of FrequencyUp to 5 GHzUp to 2.4 GHz2. Speed or Rate in Mbps6, 9, 12, 18, 24, 36, 48, 541, 2, 5.5, 6, 9, 11, 12, 18, 22,24, 33, 36, 48, 543. ModulationBPSK or Binary Phase ShiftKeying, QPSK or QuadraturePhase Shift Keying, 16 QAMor Quadrature AmplitudeModulation 64 QAM orQuadrature AmplitudeModulation (OrthogonalFrequencyDivisionMultiplexing or OFDM)DPSK or Differential PhaseShift Keying, DQPSK orDifferentially QuadraturePhase Shift Keying, CCK(DSSS or Direct SequenceSpread Spectrum, FH and IR) 4. Base Rate Up to 6 MbpsUp to 1 or 2 Mbps
Wireless Local Area Networks vs. 802.11b_3
3WIRELESS NETWORKS5. Forward Error CorrectionRate1/2, 2/3, ¾ NA6. Main FunctionsProvides eight PHY orphysical modes and furthertransmits data (Naraei, Amiri& Saberi, 2014).Serving as an interfacebetween the host device andthe physical layer; moreover,the most important featuresare the CRC or CyclicRedundancy Check and thePacker Fragmentation.The above given table helps to understand the basic contrast and the comparisonsbetween the two most important standards of 802.11, the 802.11a and the 802.11b. The commonfeature between these two is that both the standards do their tasks in the WLAN’s physical layer. Question 2.aExplain how 802.11i allows for a client device to be authenticated against an authenticationserver.SolutionThe enhancement of the 802.11 standard is done by the 802.11i standard with the help ofseveral new and innovative security mechanisms to be sure about the confidentiality and theintegrity of the messages (Naraei, Amiri & Saberi, 2014). Additions are one of the innovativesecurity mechanisms. The other mechanisms are the perfect substitutes of the major processes ofthe standard 802.11. Some other standard of IEEE is allowed by 802.11i. This particular standardis the authentication algorithm of 802.1x port. It provides a typical framework for obtaining thestrong management of the keys and the mutual authentication (Vinel, 2012). The process ofauthentication, which begins at the first step is carried out with the help of two specific andrelevant ways. The first way is by utilizing the PSK or the Pre-Shared Key whereas the second
Wireless Local Area Networks vs. 802.11b_4

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