a standard ieee 802 1x wireless network environment

... two areas as authorized and attacker The authorized area consists of two wireless stations associated to the access point which follow the IEEE 802. 11 standard MAC layer The attacker area belongs ... [1, 27] are used which are identified in Table In the IEEE 802. 11 standard, except for the unicast data and management frames that are transmitted in the normal data rates, the other frames including ... replay attacks, and wireless DoS attacks are still possible against the wireless networks The prevention of wireless DoS attacks based on the NAV validation methods was initially deliberated...

Ngày tải lên: 21/06/2014, 05:20

... IEEE Standard 802. 11i, 2004 Edition Also available at http://standards .ieee. org/getieee802/download /802. 11i-2004.pdf IEEE Standard 802. 1X, 2004 Edition Also available at http://standards .ieee. org/getieee802/download /802. 1X- 2004.pdf ... 802. 11 Standards Table A- 1 summarizes the various IEEE 802. 11 standards The table contains a description, purpose keywords and remarks, and estimated product availability for each standard Table A- 1 ... Summary of IEEE 802. 11 Standards IEEE Standard 802. 1 1a 802. 11b 802. 11d 802. 11e Description Purpose Keywords and Other Remarks A physical layer standard that operates in the GHz UNII radio band...

Ngày tải lên: 14/02/2014, 08:20

... probability that an error occurs during the handshake of the multicast data frame and the corresponding ACK frame, (viii) q: the probability that an ACK frame has a piggybacked uplink data frame, ... phase and assuming that the uplink data frames can be piggybacked on the ACK frames EURASIP Journal on Wireless Communications and Networking 1.6 Table 2: Values of parameters used for numerical ... 80, and 100, we generated ten IEEE 802. 1 1a 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...

Ngày tải lên: 21/06/2014, 23:20

... STA 17 STA 27 STA 19 STA STA 23 STA 11 STA 21 STA STA STA 15 STA 20 STA STA AP STA STA 22 STA 16 STA 13 STA STA 30 STA 14 STA 26 STA STA 12 STA 10 STA 25 Figure 3: IEEE 802. 1 1a wireless LAN (i) ... STA 4, STA 27], (STA 14), (STAs 15 and 1), (STAs 16 and 30), (STAs 25 and 23), and (STA 7); (iv) R = 1.8 r: [STA 25, STA 14], (STAs 23 and 30), (STAs and 27), [STA 8, STA 16, STA 15, STA 4], and ... (STAs and 25), (STAs 27 and 14), (STAs 7, 15 and 1), (STAs and 30), and (STAs 16 and 23); Mean delay bound (ms) 19.2 (ii) R = 1.3 r: (STAs and 30), (STAs and 25), (STAs 14 and 15), (STAs and...

Ngày tải lên: 21/06/2014, 23:20

... average time associated with the transmission of a payload, an ACK frame, a PHY header, and a MAC header, respectively These can be easily obtained by dividing LPAYLOAD , LACK , LPHY , and LMAC ... estimation on the transmission rate of frames actually leaved from the APs or STAs The other reason is that an STA is not in the propagation range of other STAs as known as hidden terminal As an ... Channel busy ratio (Rbusy ) Actual Bn+1 D(Bn+1 ) Range A Mean A Actual Bn+1 D(Bn+1 ) Range A Mean A Actual Bn+1 D(Bn+1 ) Range A Mean A (a) FER = 0.1 (b) FER = 0.25 (c) FER = 0.5 Figure 11: Case...

Ngày tải lên: 21/06/2014, 23:20

... data packet MATHEMATICAL MODELING In this paper, we assume that the network consists of n contending stations and each station always has a packet IEEE 802. 11 Performance Analysis 69 b(t) changes ... backoff mechanism and relates the average packet delay with the packet interarrival time, the packet drop probability, and the average time to drop a packet MODEL VALIDATION The mathematical analysis ... indicates the maximum number of retransmission attempts of a data packet when the basic access scheme is utilized In IEEE 802. 11, a station waits a random backoff interval before initiating a packet...

Ngày tải lên: 23/06/2014, 00:20

... Macaulay Copyright EWA Canada 2002 i Hardening IEEE 802. 11 wireless networks Introduction IEEE 802. 11 is a Wireless Local Area Network (WLAN) standard which specifies a radio interface and Layer ... the Beacon information Or, an Access Point can change its configuration data (for any number of reasons) and users can find it again through the Beacon Similarly, a user can roam into an area supported ... leakage from an Access Point There are two simple ways in which an administrator can attempt to mitigate RF leakage which allows other to intercept WLAN data: a) Antenna placement Do not place Access...

Ngày tải lên: 08/08/2014, 09:22

... of various WLAN standards IEEE 802. 11 is the dominant WLAN standard At the time that the IEEE 802. 11i amendment was finalized, WLAN equipment based on IEEE 802. 11b was the most popular; it was ... supplicant, and authentication server The authenticator is an entity such as an AP that facilitates an authentication attempt The supplicant is an entity such as a STA that is authenticated by an authenticator ... to IEEE 802. 11, and Section 2.1.3 briefly highlights other wireless networking standards 2.1.1 IEEE 802. 11 Standards In 1997, IEEE ratified the 802. 11 standard for WLANs The IEEE 802. 11 standard...

Ngày tải lên: 14/02/2014, 08:20

... evaluated a mobile web-browsing application (Wapedia) on a PDA in an indoor IEEE 802. 11b/g Wireless LAN environment The aim was to assess and model the relation between the subjective evaluation ... dynamic loading and unloading of additional monitoring probes The back-end was programmed in Java using the Java Enterprise Edition 5 framework and the standard Sun Application server with a Derby ... 2 EURASIP Journal on Wireless Communications and Networking and evaluated in terms of QoE by a user panel in an indoor IEEE 802. 11b/g Wireless LAN environment By means of a short questionnaire...

Ngày tải lên: 21/06/2014, 18:20

... voice, but this advantage disappears for data-centric applications These advantages are not sufficient to overcome the advantages of OFDMA-based technology like IEEE8 02.16 As data traffic continues ... indicate that cell size of remote open area is bigger than the cell size of urban dense area 14 c1 urban area c2 suburban area c3 rural area (a) Channel capacity by access scenario Number of active ... terminal, and a large number of statistically multiplexed users Along with the fundamental task of allocating bandwidth and transporting data, the MAC includes a privacy sublayer that provides authentication...

Ngày tải lên: 21/06/2014, 18:20

... cell ieee 802. 11e wlans: Uniqueness and multistability, IEEE/ ACM Transactions on Networking,, vol.16 (2008), pp 1080-1093 Shimoyamada Y., Sanada K., and Sekiya H., Non-saturated and saturated ... accurate non saturation IEEE 802. 11e EDCA model for an arbitrary buffer size, IEEE Transactions on Mobile Computing, vol.99 (2012), pp 1-5 Ramaiyan V., Kumar A. , and Altman E., Fixed point analysis ... CTS, and ACK packets as LRTS , LCTS , LACK , respectively The transmission durations of RTS, CTS, ACK and DATA packets are TRTS = LRTS L ; TCTS = CTS ; Rbasic Rbasic TACK = LACK L ; TDATA = DATA...

Ngày tải lên: 13/08/2015, 10:00

... the data An example of this is when an animal is tagged with a transmitter and the signal is collected and data is gathered over a period of time to be interpreted at a later date Monitoring applications ... Local Multipoint Distribution Services Wireless Local Loop Point-to-Point Microwave Wireless Local Area Networks Why the Need for a Wireless LAN Standard? What Exactly Does the 802. 11 Standard ... Services Creating a Detailed Physical Design Creating a Detailed Operations Design Creating a Detailed Operating Model Design Creating a Training Plan Developing a Maintenance Plan Developing an Implementation...

Ngày tải lên: 16/10/2013, 13:15

... portal.fabrikam.com, create a CNAME (canonical name) record named home and specify ServerA.ad.fabrikam.com as the target host C In ad.fabrikam.com, create CNAME (canonical name) record named ... have a zone ad.fabrikam.com and we want to use the name home.portal.fabrikam.com as an alias for the resource ServerA.ad.fabrikam.com We this by creating a new zone portal.fabrikam.com, add a ... ad.fabrikam.zone with ServerA.ad.fabrikam.com target host would map portal.ad.fabrikam.zone to ServerA.ad.fabrikam.com, but we want to map home.portal.fabrikam.com to ServerA.ad.fabrikam.com C: Adding...

Ngày tải lên: 10/12/2013, 14:16

... standards indicated ANSI and TIA maintain registers of currently valid national standards published by them ANSI/TIA/EIA-568-B.2-10, Transmission Performance Specifications for Pair 100 Ohm Augmented ... Commercial Building Telecommunications Cabling Standard Part 1: General Requirements ANSI/TIA/EIA-568-B.2, Commercial Building Telecommunications Cabling Standard Part 2: 100 Ohm Balanced Twisted-pair ... Cabling Standard ANSI/TIA/EIA-568-B.2-1, Transmission Performance Specifications for Pair 100 Ohm Category Cabling DEFINITIONS, ACRONYMS & ABBREVIATIONS Alien crosstalk: A measure of the unwanted...

Ngày tải lên: 20/12/2013, 22:15

... type a directory name or file name in a dialog box or at a command prompt ALL CAPITALS Indicate the names of keys, key sequences, and key combinations — for example, ALT+SPACEBAR monospace Represents ... on installation and configuration tasks, as well as network and operating system management tasks The technical support specialist is the secondary audience for Course 212 6A The technical support ... domain names, e-mail addresses, logos, people, places, and events depicted herein are fictitious, and no association with any real company, organization, product, domain name, e-mail address,...

Ngày tải lên: 21/12/2013, 06:16

... signature database current The majority of IDS that are currently available for use are signature based Because new vulnerabilities and attacks are being discovered daily, the signature database ... functional areas, which are seldom used but potentially have vulnerabilities, prevents an attacker from being able to take advantage of them An application may install sample CGI scripts or other applications, ... Knowledge Base article 288358 for more information An additional safeguard can be made by disabling the storage of the LM hash in the local SAM database or Active Directory if the system is a domain...

Ngày tải lên: 14/02/2014, 08:20

... security attacks to help organizations and users understand some of the attacks against WLANs Attacks Passive Attacks Eavesdropping Traffic Analysis Active Attacks Masquerade Replay Message Modification ... coverage range: Wireless Wide Area Networks (WWAN), WLANs, and Wireless Personal Area Networks (WPAN) WWAN includes wide coverage area technologies such as 2G cellular, Cellular Digital Packet Data ... the clear from a wireless NIC to an AP, the MAC can be easily captured Malicious users can spoof a MAC address by changing the actual MAC address on their computer to a MAC address that has access...

Ngày tải lên: 14/03/2014, 20:20

Ngày tải lên: 23/03/2014, 22:20

... Prologue: Wireless Personal Area Networks 1.1 Wireless Ad Hoc Networks Wireless ad hoc networks are a category of wireless networks that utilize multi-hop relaying of packets yet are capable of operating ... WIRELESS PERSONAL AREA NETWORKS 1.4.2 IEEE 802. 11 MAC The IEEE 802. 11 protocol (O’Hara and Petrick 1999) is, strictly speaking, intended for wireless local area networks (LANs), rather than wireless ... 258 Preface Wireless personal area networks and wireless sensor networks are rapidly gaining popularity, and the IEEE 802. 15 Wireless Personal Area Working Group has defined no less than three...

Ngày tải lên: 25/03/2014, 12:14

... Technology, 2008) AH Sayed, A Tarighat, N Khajehnouri, Network- based wireless location: challenges faced in developing techniques for accurate wireless location information IEEE Signal Process Mag 22(4), ... Sahinoglu, Sahinoglu, Localization via ultra-wideband radios: a look at positioning aspects for future sensor networks IEEE Signal Process Mag 22(4), 70–84 (2005) G Mao, B Fidan, Localization Algorithms ... measurement errors (drawn from an exponential distribution) and both positive and negative measurement errors (drawn from a zero-mean Gaussian distribution) Gholami et al EURASIP Journal on Wireless...

Ngày tải lên: 20/06/2014, 22:20