ieee 802 11 wireless lan security ppt

... of IEEE 802.11a, IEEE 802.11b, and IEEE 802.11g technologies support the max-imum PHY data rates of 54 Mbps, 11 Mbps, and 54 Mbps, respectively [2 4] All these PHY variants of IEEE 802.11 wireless ... 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 wireless LAN with the conventional ... University REFERENCES [1] IEEE Std 802.11, “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,” 1999 [2] IEEE Std 802.11a, “Wireless LAN Medium Access Control (MAC)

Ngày tải lên: 21/06/2014, 23:20

... 10.1.1.100 Windows PCs (XP) Gigabit Ethernet AP 802.11b channel #1 Windows laptop (Vista) 802.11b NIC Windows laptops (XP) 802.11b NIC AP 802.11b channel #11 Wireless network monitor (NetMon) 10.1.1.10 ... equipping Netgear JWAG511 WLAN NIC and is associated with an 802.11b AP (cAP) on channel number 1 On the other hand, there exists a neighbor 802.11b AP (nAP) on channel number 11 which is orthogonal ... radio resource measurements for WLAN are defined in IEEE 802.11k [15], and how meaningful data can be collected through the measurements is discussed in [16] The 802.11k enables STAs to request measurements

Ngày tải lên: 21/06/2014, 23:20

... performance and improves the services that the IEEE 802.11 protocol provides to various communication applications Keywords and phrases: IEEE 802.11, wireless LANs, DCF, packet delay, protocol tuning. ... cited. growing needs of wireless data networking, the IEEE working group proposed the 802.11 protocol family [2] The IEEE 802.11 protocols have become the domi-nant standard for WLANs and can offer ... and packet element transmission times defined by IEEE 802.11 specifications Furthermore, we have suitably modified the model of the IEEE 802.11 wireless sta-tion provided in the standard library

Ngày tải lên: 23/06/2014, 00:20

... duration 15 See discussion of WEP security and 802.1X 16 Bernard Aboba, Microsoft, Wireless LANS: the 802.1X Revolution, Dec 2001. 17 Nokia C110/C111 802.11b cards support station-unique WEP ... One final 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 5 Ghz range and ... the primary distinction from 802.11b While this paper applies mainly to 802.11b, it is generally applicable to the 802.11x wireless network specification as a whole 2 WLAN architecture This section

Ngày tải lên: 08/08/2014, 09:22

... Medium access control ► security Trang 19IEEE 802.11 Protocol Architecture802.11 2.4 GHz FHSS 802.11 2.4 GHz DSSS 802.11 Ird 802.11a 5 GHz OFDM 802.11g 2.4 GHz OFDM 802.11b 2.4 GHz DSSS Distributed Coordination Function (DCF) ... IEEE 802.11i: Supplementary MAC Standard: Alternative WEP ► IEEE 802.11n: 100 + Mbps : Enhancement to 802.11g using MIMO ► IEEE 802.11s : mesh networking extension Trang 8IEEE 802.11 Architecture WLAN ... Trang 1Wireless NetworksLecture 26 Wireless LAN / IEEE 802.11 Dr Ghalib A Shah Trang 3Standardization of Wireless Networks Wireless networks are standardized by IEEE.  Under 802 LAN MAN standards

Ngày tải lên: 05/07/2022, 13:17

... Trang 1Wireless NetworksLecture 29 Security in IEEE 802.11 Dr Ghalib A Shah Trang 2► AKM Operations with AS► AKM operations with PSK  IBSS Security model Trang 3Last Lecture ... Authentication Server 802.1X • created to control access to any 802 LAN • used as a transport for Extensible Authentication Protocol  (EAP, RFC 2284) Trang 20AKM Operation with AS Prior to any use of IEEE 802.1X, ... authentication, key management methods without changing NIC or Access Point Trang 17How 802.1x Address Security Issues of 802.11 EAP Framework  User Identification & Strong authentication  Dynamic

Ngày tải lên: 05/07/2022, 13:18

... these two extremes 12.1 Nokia C110/C111 Nokia's 802.11b solution comes in two similar form factors The C110 is a Type 2 PC Card with an integrated antenna; the C111 is basically the same, but ... an encoding of Schiller's Ode to Joy for transmission over an 802.11a network.[2] Shortly after 802.11a was published, the IEEE 802.11 working group discovered several errors in the example and ... a WaveLAN/IEEE card Once 802.11 was ratified and products were brought to market, Lucent distinguished between the earlier proprietary cards and the 802.11-compliant cards by adding "IEEE"

Ngày tải lên: 14/08/2014, 13:20

... the IEEE 802.11 EDCA in Wireless Multi-hop Networks Minh Trong Hoang*, Minh Hoang, Duc Cong Le Abstract The IEEE 802.11e standard has been introduced to support service differentiation for wireless ... non saturation IEEE 802.11e EDCA model for an arbitrary buffer size, IEEE Transactions on Mobile Computing, vol.99 (2012), pp 1-5 Fixed point analysis of single cell ieee 802.11e IEEE/ACM Transactions ... EDCA to optimize QoS differentiation and network performance References [1] IEEE, - IEEE 802.11 Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Amendment

Ngày tải lên: 13/08/2015, 10:00

... the IEEE 802.11 EDCA in Wireless Multi-hop Networks Minh Trong Hoang*, Minh Hoang, Duc Cong Le Abstract The IEEE 802.11e standard has been introduced to support service differentiation for wireless ... non saturation IEEE 802.11e EDCA model for an arbitrary buffer size, IEEE Transactions on Mobile Computing, vol.99 (2012), pp 1-5 Fixed point analysis of single cell ieee 802.11e IEEE/ACM Transactions ... EDCA to optimize QoS differentiation and network performance References [1] IEEE, - IEEE 802.11 Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Amendment

Ngày tải lên: 17/03/2021, 20:27

... 802.11 gốc (802.11 Trang 6 Sau đó 2 chuẩn, IEEE 802.11a (băng tần 5,8 GHz) và IEEE 802.11b (băng tần 2,4 GHz), lần lượt được phê duyệt tháng 12/1999 và tháng 1/2000  Sau khi có chuẩn 802.11b, ... trao đổi dữ liệu với nhau Trang 11Các chế độ hoạt động (a, Infrastructure; b, Ad-hoc) Trang 12Các chuẩn an ninh hỗ trợ IEEE 802.11 IEEE 802.11 (WEP) IEEE 802.1X Wi-Fi Protected Access (WPA) ... OSI  IEEE 802.11 là chuẩn đặc tả mạng cục bộ không dây, sử dụng phương pháp truy nhập CSMA/CA. Trang 9Cấu trúc WLAN  Một WLAN thông thường gồm có 2 phần: các thiết bị truy nhập không dây (Wireless

Ngày tải lên: 29/12/2022, 14:50

... To Set Up Wireless Network Security Part 1: WEP Step1: Setting up Access Point’s WEP encryption key 1 Log into the Access Point using your WEB browser (e.g Internet Explorer) Go to Wireless ... Setting up Workstation’s WEP Key 2a If you are using D-Link Wireless Utility to configure your D-Link Wireless Card: 1 Open the D-Link AirPlus wireless utility by double-clicking on the bar graph icon ... go to Start > Control Panel > Network) 2 Select your Wireless LAN Card, right click on the icon and select “Properties” Click on “Wireless Network” tab 3 Select the Access Point which you

Ngày tải lên: 05/03/2014, 23:20

... dây là : IEEE 802.11b, IEEE 802.11a, IEEE802.11g e© Chuan IEEE 802.11b Release | Op Data rate | Data Rate | Range (Indoor) Date Frequency (Typ) (Max) 1999 2.4GHZ 6.5 Mbit/s 11 Mbit/s ... dẫn thích hợp từ mạng đường trục Tiêu chuẩn chính của WLAN hiện nay là IEEE 8§02.11b còn IEEE 802.11a dành cho tốc độ bit cao hơn HiperLAN/2 được dự định gộp cả tiêu chuẩn Chương 1: Giới thiệu ... of— Sight Hình 1.2 Mô hình mạng và độ phủ sóng Wlan Infra-red Wireless Lans khéng linh hoat bang hé théng WLAN sir dụng chuẩn IEEE 802.11, bởi vì hệ thống này sử dụng tín hiệu hồng ngoại

Ngày tải lên: 28/04/2014, 10:49

... DCF vs DCW (b) 500 Bytes: IEEE 802.11+vs DCW (c) 1500 Bytes: DCF vs DCW (d) 1500 Bytes: IEEE 802.11+vs DCW (e) 2312 Bytes: DCF vs DCW (f) 2312 Bytes: IEEE 802.11+vs DCW Figure 7 Collision ... DCW (b) 500 bytes: IEEE 802.11 + versus DCW (c) 1500 bytes: DCF versus DCW (d) 1500 bytes: IEEE 802.11 + versus DCW (e) 2312 bytes: DCF versus DCW (f) 2312 bytes: IEEE 802.11 + versus DCW. Trang ... versus DCW (b) 500 bytes: IEEE 802.11+versus DCW (c) 1500 bytes: DCF versus DCW (d) 1500 bytes: IEEE 802.11+versus DCW (e) 2312 bytes: DCF versus DCW (f) 2312 bytes: IEEE 802.11+versus DCW.

Ngày tải lên: 20/06/2014, 22:20

... Trang 1R E S E A R C H Open AccessHandoff optimization in 802.11 wireless networks IP Hsieh and Shang-Juh Kao* Abstract In 802.11 wireless networks, a complete handoff procedure for a mobile ... rate [27] In an 802.11 WLAN, APs are incapable of maintaining signal quality due to the movement of MNs and various interferences Furthermore, WiFi is a con-tention-oriented wireless access technology ... channel is less interfered The channel utilization, which has been defined in the standard of IEEE 802.11-2007 [1] as a resource usage indicator, could be detected by APs and MNs It is defined as

Ngày tải lên: 21/06/2014, 02:20

... 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 and interference ... CCA.Section 5gives the conclusions of this paper 2 IEEE 802.11 DCF BASED ON THE CSMA/CA PROTOCOL Figure 1depicts an example configuration covered by IEEE 802.11 standards [5,6], where a set of stations ... type value of a data frame is defined as 10 and the subtype values 1000–1111 for the data frame are reserved in IEEE 802.11 These reserved subtype values can provide the required 3 bits to carry

Ngày tải lên: 22/06/2014, 22:20

... 1Wireless LAN SecurityHồ Đắc Biên bien.ho@ttgtc.com 0985 196 884 MCSA, MCITP-EA, CCNP, , , , CCIE Written, Security+, CEH Trang 2Introduction WLAN Security Threats Evolution of Wireless LAN Security ... 3Introduction WLAN Security ThreatsTrang 4IntroductionTrang 5Wireless LAN Security ThreatsTrang 7Toys for HackersTrang 8A Dual-Use ProductTrang 9NetstumblerTrang 10KismetTrang 11Sniffer on WLAN• All ... SSID and Channel. Trang 22Crack WEP Key1 Wireless card support crack WEP key pp y Trang 23Wireless Card Crack WEPTL-WN510G WG511T WG111T D-Link WUA-1340 WG111T Trang 24Setup Card & Begin ScanFirst,

Ngày tải lên: 07/07/2014, 07:20

... lower-layer LAN technology Management 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 Chapter 11 802.11a: 5-GHz OFDM PHY Section 11.1 Orthogonal Frequency Division Multiplexing (OFDM) Section 11.2 OFDM as Applied by 802.11a Chapter 13 Using 802.11 on Linux ... layer of the 802.11 standard in detail 802.11, like all IEEE 802 networks, splits the MAC-layer functionality from the physical medium access Several physical layers exist for 802.11, but the

Ngày tải lên: 14/08/2014, 13:20

... Niels Bohr In wireless networks, the word "broadcast" takes on an entirely new meaning Security concerns have haunted 802.11 deployments since the standardization effort began IEEE's attempt ... clause 8.2 of 802.11 WEP can be used by stations to protect data as it traverses the wireless medium, but it provides no protection past the access point Many of the headlines about 802.11 over the ... demanding a high level of security and therefore offers a comparatively smaller level of protection The IEEE 802.11 working group has devoted an entire task group to security The task group is

Ngày tải lên: 14/08/2014, 13:20

... service, the 802.11 standard includes a second coordination function to provide a different way of accessing the wireless medium The point coordination function (PCF) allows an 802.11 network to ... simply on Power conservation in 802.11 is achieved by minimizing the time Trang 6spent in the latter stage and maximizing the time in the former However, 802.11 accomplishes this without sacrificing ... 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 working group At the

Ngày tải lên: 14/08/2014, 13:20

... WLAN 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 ... on Wireless Security, 2004. IEEE Standard 802. 11, 1999 Edition. IEEE Standard 802. 11i, 2004 Edition. Also available at http://standards .ieee. org/getieee802/download /802. 11i-2004.pdf. IEEE ... 1999, IEEE ratified two amendments to the IEEE 802. 11 standard IEEE 802. 11a and IEEE 802. 11b—that define radio transmission methods and modulation techniques. WLAN equipment based on IEEE 802. 11b...

Ngày tải lên: 14/02/2014, 08:20