securing the ieee 802 11 wireless lans
Tài liệu Guide to Securing Legacy IEEE 802.11 Wireless Networks ppt
... technologies: IEEE 802. 11a, 802. 11b, 802. 11g, and 802. 11n In addition, a brief overview of the updated security standard for IEEE 802. 11 networks, IEEE 802. 11i, is provided 2.1 IEEE 802. 11 Variants ... techniques, such as IEEE 802. 11a, 802. 11b, and 802. 11g; any future IEEE 802. 11 standard will also be compatible with IEEE 802. 11i Table 2-1 Summary of IEEE 802. 11 WLAN Technologies IEEE Standard or ... lists legacy IEEE 802. 11 WLAN references Appendix E lists legacy IEEE 802. 11 WLAN online resources 1-2 GUIDE TO SECURING LEGACY IEEE 802. 11 WIRELESS NETWORKS Overview of IEEE 802. 11 Wireless Local...
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Báo cáo hóa học: " Research Article Connectivity-Based Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs" doc
... ten IEEE 802. 11a wireless LANs, where the APs are located at the centers of the circular service areas of radius 400 m, and n STAs are randomly located in the service areas According to [11] , the ... for IEEE 802. 11 wireless LANs, ” EURASIP Journal on Wireless Communications and Networking, vol 2008, Article ID 598038, 10 pages, 2008 [11] K Xu, M Gerla, and S Bae, “How effective is the IEEE 802. 11 ... following the transmission of the AP or the previous recipient in the sequence, the AP will initiate the next RAK polling procedure for the sequence, Qi+1 , a PIFS period after the end of the previous...
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Báo cáo hóa học: " Article ID 598038, 10 pages doi:10.1155/2008/598038 Research Article Hybrid Polling Method for Direct Link Communication for IEEE 802.11 Wireless LANs Woo-Yong Choi" pot
... the author One slot time is microseconds in IEEE 802. 11a wireless LANs In Figures 4, 5, 6, 7, 8, 9, 10, 11, and 12, we present the simulation results of the maximum delay bounds of IEEE 802. 11a ... bounds when the heavy traffic load (B = 8) is imposed on IEEE 802. 11a wireless LAN with 30 STAs Figure 11: Mean delay bounds when the medium traffic load (B = 5) is imposed on IEEE 802. 11a wireless ... (B = 11) is imposed on IEEE 802. 11a wireless LAN with 20 STAs Figure 8: Mean delay bounds when the medium traffic load (B = 7) is imposed on IEEE 802. 11a wireless LAN with 30 STAs of thirty wireless...
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Báo cáo hóa học: " IEEE 802.11 Wireless LANs: Performance Analysis and Protocol Refinement" pot
... forth The simulator closely follows all timer values and packet element transmission times defined by IEEE 802. 11 specifications Furthermore, we have suitably modified the model of the IEEE 802. 11 wireless ... include the finite packet retry limits as defined in the IEEE 802. 11 standard [2] In [7], we provide a new performance analysis of the 802. 11 protocol, which is based on the extensively-used-in -the- literature ... the performance of the IEEE 802. 11 protocol, namely, the throughput efficiency, the average packet delay, the packet drop probability as well as the average time to drop a packet By employing the...
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A Contribution to Performance Analysis Approach of the IEEE 802.11 EDCA in Wireless Multi-hop Networks
... differentiation to analyze the throughput and delay of the IEEE 802. 11e However, the impact of AIFS differentiation is not covered The proposed analytical model in [5] use the AC-specific EDCA cycle ... Conclusion This paper presented the analytical model which is enhanced from the model of 802. 11 DCF based on Markov chains to analyze the performance of IEEE 802. 11e EDCA in multihop networks By ... analysis of the IEEE 802. 11e EDCA saturation, IEEE International Conference on Communications, (2005), pp 3450- 3454 Peng F., Peng B., and Qian D., - Performance analysis of IEEE 802. 11e enhanced...
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Báo cáo hóa học: " Dynamic tuning of the IEEE 802.11 distributed coordination function to derive a theoretical throughput limit" pot
... of nodes and the collision probability, respectively The DCF curve uses the standard IEEE 802. 11 algorithm, and the curve for IEEE 802. 11+ uses the algorithm presented in [4] where the number of ... 500 Bytes: IEEE 802. 11+ vs DCW (d) 1500 Bytes: IEEE 802. 11+ vs DCW (f) 2312 Bytes: IEEE 802. 11+ vs DCW Figure Normalized throughput (a) 500 bytes: DCF versus DCW (b) 500 bytes: IEEE 802. 11+ versus ... uses the standard IEEE 802. 11 algorithm, and the curve for IEEE 802. 11+ uses the algorithm presented in [4] where the number of nodes is known Similar results are obtained for the different packet...
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Báo cáo hóa học: " Research Article Design and Implementation of a Lightweight Security Model to Prevent IEEE 802.11 Wireless DoS Attacks" pdf
... in the access point and wireless stations is included in the 8021 1MgmtAP-STSF and 8021 1MgmtSTASTSF sublayers, respectively The structure of the 8021 1-ACFNC-NIC for the access point including the ... implement the STSF, we created a new management sublayer in the 8021 1ACFNC-NIC for the wireless stations and access point which are called 8021 1MgmtSTA-STSF and 8021 1MgmtAPSTSF, respectively The ACFNC ... q: # NetworkLayer 8021 1 ACFNC NIC pingApp q: # Radio 8021 1 ACFNC MAC 8021 1 MgmtAP STSF Figure 5: Structure of the protected 8021 1-ACFNC-NIC in the simulation environment B the percentage of performance...
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Báo cáo hóa học: " Research Article Achievable Throughput-Based MAC Layer Handoff in IEEE 802.11 Wireless Local Area Networks" pptx
... an 802. 11b AP (cAP) on channel number On the other hand, there exists a neighbor 802. 11b AP (nAP) on channel number 11 which is orthogonal to that of the cAP The nAP is a target to measure the ... since the loaded traffic on the 802. 11b APs ( 11 Mbps) is less than that on the 802. 11a APs (≤54 Mbps) so that the utilization remains in about 60% On the other hand, the average utilization of ... each of these individually occupies about Mbps bandwidth on the cAP) On the other hand, in the BSS2, a neighbor AP (nAP) supports 802. 11a Relatively lower RSSI of the nAP is acceptable for the STA...
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Báo cáo hóa học: " A New MAC Protocol with Pseudo-TDMA Behavior for Supporting Quality of Service in 802.11 Wireless LANs" docx
... of IEEE 802. 11e for QoS support in wireless LANs, ” IEEE Wireless Communications, vol 10, no 6, pp 40–50, 2003 [3] J W Robinson and T S Randhawa, “Saturation throughput analysis of IEEE 802. 11e ... of quality of service in IEEE 802. 11 networks,” IEEE Wireless Communications, vol 11, no 4, pp 6–14, 2004 [13] J Deng and R.-S Chang, “A priority scheme for IEEE 802. 11 DCF access method,” IEICE ... of an admission algorithm The model is designed to be backward compatible with the other 802. 11 protocols The rest of the paper is organized as follows In Sections and the proposed model is described...
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Hardening IEEE 802.11 wireless networks pot
... word before we commence; 802. 11a is the next generation in the wireless world after 802. 11b, and is a very close in design and function to 802. 11b 802. 11a operates in the Ghz range and offers ... it, the intruder will have free access for the duration 15 See discussion of WEP security and 802. 1X Bernard Aboba, Microsoft, Wireless LANS: the 802. 1X Revolution, Dec 2001 17 Nokia C110/C 111 802. 11b ... Hardening IEEE 802. 11 wireless networks out the MAC address for a given device, administrators will simply need to consult the 802. 11 client interface software which will be installed with the 802. 11...
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802.11 wireless networks the definitive guide second edition
... in the ISM bands as well 802. 11b and 802. 11g devices operate within the 2.4 GHz ISM band, while 802. 11a devices operate in the GHz band The more common 802. 11b/g devices operate in S-band ISM The ... Chapter 3, 802. 11 MAC Fundam ent als, describes the Media Access Control (MAC) layer of the 802. 11 standard in detail 802. 11, like all IEEE 802 networks, splits the MAC-layer functionality from the ... differences between an 802. 11 device and an Ethernet device, but the most obvious is that 802. 11 devices are mobile; they can easily move from one part of the network to another The 802. 11 devices on...
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Báo cáo hóa học: " Research Article Reducing the MAC Latency for IEEE 802.11 Vehicular Internet Access" pdf
... 802. 11 b, a myriad of research has been conducted for other standards in the 802. 11 family, confirming the suitability of 802. 11 WLANs for vehicle scenarios [6, 7] 2.2 Handoff In the IEEE 802. 11 ... Gustat, “An Integrated CMOS RF Synthesizer for 802. 11a Wireless LAN,” IEEE Journal of SolidState Circuits, vol 38, no 10, pp 1767–1770, 2003 [12] IEEE 802. 11, “Part11: Wireless LAN Medium Access Control ... the MS will then follow the legacy 802. 11 procedure, that is, authentication and association to the AP When the corresponding AP’s signal strength decreases, the MS will then search for an adjacent...
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Báo cáo hóa học: " CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802.11 DCF" docx
... share the same wireless channel, a MAC protocol is needed to coordinate their access At the MAC layer, the IEEE 802. 11 specifies a basic DCF based on the CSMA/CA protocol For DCF operations, IEEE 802. 11 ... which the type and subtype fields together identify the function of the frame The type value of a data frame is defined as 10 and the subtype values 1000 111 1 for the data frame are reserved in IEEE ... compare it with that of the CSMA/CA protocol in the IEEE 802. 11 DCF In the simulations, we assume a “near-field” radio technology in use in the investigated IEEE 802. 11 WLANs, where both capture...
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Báo cáo hóa học: " MAC Security and Security Overhead Analysis in the IEEE 802.15.4 Wireless Sensor Networks" potx
... should the processing speed of a device be for decryption under the current IEEE 802. 15.4 parameters? The rest of the paper is organized as follows Section briefly introduces the IEEE 802. 15.4 ... includes the length of the authenticated data The integrity code is computed at the receiver side and compared with the received integrity code The CTR combines the CBC-MAC to become the CTRCBC-MAC ... that requires the generation of the MIC first and then the encryption, and decryption-verification that requires first the decryption of the ciphertext and then the verification of the MIC A sender...
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o'reilly-802.11 wireless networks- the definitive guide
... differences between an 802. 11 device and an Ethernet device, but the most obvious is that 802. 11 devices are mobile; they can easily move from one part of the network to another The 802. 11 devices on ... Figure 2-1 shows the relationship between the various components of the 802 family and their place in the OSI model Figure 2-1 The IEEE 802 family and its relation to the OSI model IEEE 802 specifications ... features for 802 networks are specified in 802. 1 Among 802. 1's many provisions are bridging (802. 1d) and virtual LANs, or VLANs (802. 1q) 802. 11 is just another link layer that can use the 802. 2/LLC...
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802.11® Wireless Networks: The Definitive Guide phần 1 pot
... differences between an 802. 11 device and an Ethernet device, but the most obvious is that 802. 11 devices are mobile; they can easily move from one part of the network to another The 802. 11 devices on ... Figure 2-1 shows the relationship between the various components of the 802 family and their place in the OSI model Figure 2-1 The IEEE 802 family and its relation to the OSI model IEEE 802 specifications ... features for 802 networks are specified in 802. 1 Among 802. 1's many provisions are bridging (802. 1d) and virtual LANs, or VLANs (802. 1q) 802. 11 is just another link layer that can use the 802. 2/LLC...
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802.11® Wireless Networks: The Definitive Guide phần 2 ppsx
... body of the frame are included in the FCS Although 802. 3 and 802. 11 use the same method to calculate the FCS, the MAC header used in 802. 11 is different from the header used in 802. 3, so the FCS ... is used for the receiver, Address for the transmitter, with the Address field used for filtering by the receiver Addressing in 802. 11 follows the conventions used for the other IEEE 802 networks, ... CF-Ack (no data transmitted) 0110 CF-Poll (no data transmitted) 0111 Data+CF-Ack+CF-Poll (Frame type 11 is reserved) [a] Management subtypes 0110 - 0111 and 110 1 -111 1 are reserved and not currently...
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802.11® Wireless Networks: The Definitive Guide phần 3 doc
... exchange on an 802. 11 network The only differences from the previous figure are the requirements of the 802. 11 Association Request and Response before beginning the EAPOL exchange and the EAPOL-Key ... Open-system authentication is the only method required by 802. 11 Calling it authentication is stretching the meaning of the term a great deal In open-system authentication, the access point accepts the ... the ability to recover the first byte of the encrypted payload Unfortunately, 802. 11 uses LLC encapsulation, and the cleartext value of the first byte is known to be 0xAA (the first byte of the...
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802.11® Wireless Networks: The Definitive Guide phần 4 pot
... though the 802. 11 working group is in the process of standardizing the inter-access point protocol If the new access point cannot verify that the old access point authenticated the station, the ... for the mobile station to the new access point 802. 11 does not specify the communication between access points; filling in this omission is one of the major standardization efforts in the 802. 11 ... with its BSS, so the second address field is the BSSID In infrastructure networks, the BSSID is the address of the wireless interface in the access point, so the BSSID is also the transmitter...
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802.11® Wireless Networks: The Definitive Guide phần 5 pptx
... to the received signal Start Frame Delimiter (SFD) As in Ethernet, the SFD signals the end of the preamble and marks the beginning of the frame The FH PHY uses a 16-bit SFD: 0000 110 0 1 011 1101 ... (SFD) In the long PLCP, the SFD is the sequence 111 1 0 011 1010 0000 As with all IEEE specifications, the order of transmission from the physical interface is least-significant bit first, so the string ... confusion with the Long SFD, the Short SFD is the reverse value, 0000 0101 110 0 111 1 The PLCP header follows the preamble It is composed of the Signal, Service, Length, and CRC fields The long header...
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