ieee 802 11 handbook a designer s companion pot

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Ngày tải lên: 23/03/2014, 22:20

... password.  Association: establishment of an association between a terminal and an access point. Exchange of information on the possibilities of transmission of access point and terminals.  Reassociation: ... terminals to share them when MAC frames the frame must pass through the distribution system (Distribution System (DS)) to pass a terminal attached to a set of basic services (Basi...

Ngày tải lên: 17/09/2012, 09:13

... they transmit. He who emits a 1 Mbps generally require 11 times longer than that emits a 11 Mbit /s. The issuance of a frame has 1 Mbit /s lasts 11 times longer than the issuance of a frame at 11 Mbit /s. Time ... Mbit /s. Time frame for issuance of an x bits with 1 Mbit /s and with 11 Mbit /s (in s) : Rappel mathematical: A discrete random variable is a random vari...

Ngày tải lên: 17/09/2012, 09:13

... là s ra đời c a chuẩn IEEE 802. 11e và IEEE 802. 11i. Danh s ch các chuẩn con trong bộ chuẩn IEEE 802. 11 * IEEE 802. 11 - The original 1 Mbit /s and 2 Mbit /s, 2.4 GHz RF and IR standard (1999) ... loại khung IFS mới gọi là IFS-trọng tài (Arbitration IFS – AIFS) được s dụng trong EDCF thay vì s dụng DIFS trong DCF. AIFS được xác định bởi AIFS[AC] = AIFSN[AC]*SlotT...

Ngày tải lên: 05/04/2013, 15:52

... Message Replay Attacker passively monitors transmissions and retransmits messages, acting as if the attacker were a legitimate user. Misappropriation Attacker steals or makes unauthorized use ... frames govern the process of associating and disassociating APs and STAs from a WLAN. By design, the IEEE 802. 11 standard does not provide protection against these attacks. If an adve...

Ngày tải lên: 14/02/2014, 08:20

... the availability of both synchronous- and asynchronous-based resources. An activity which was previously only available to participants in a session was now accessible asynchronously to anyone ... plenary session, such as faculty- or student-led discussions, debates, in-class assignments, etc. • the before-class “learning activities” from the students’ point of view: the estimated six...

Ngày tải lên: 17/02/2014, 06:20

... for all interface designers. A similar set of design patterns exists in software also and provides a standardized way to solve and discuss common programming problems. The first major classification ... idea that an event, such as click, is issued as the result of some specific activity—usually user activity, but sometimes browser activity such as a page load—and that you can handle th...

Ngày tải lên: 18/02/2014, 01:20

... WPA– Enterprise 802. 1X TKIP/AES (Tùy chọn) 128 Xác thực mạnh, TKIP/ AES. WPA– Personal PSK TKIP/AES (Tùy chọn) 128 WPA2– Enterprise 802. 1X TKIP và AES 128 WPA2– Personal PSK ... b, Ad-hoc) 9/4/2012 11 Các chuẩn an ninh hỗ trợ IEEE 802. 11 9/4/2012 12 IEEE 802. 11 (WEP) IEEE 802. 1X Wi-Fi Protected Access (WPA) Wi-Fi Protected Access 2 (WPA2) 9/4/2012 13...

Ngày tải lên: 09/03/2014, 09:20

... RA=DA SA BSSID N /A From the AP 0 1 RA=DA BSSID SA N /A To the AP 1 0 RA=BSSID SA DA N /A Wireless DS 1 1 RA TA DA SA Table 2.1: Address Field Functions 2.2.10 Data Frame Subtypes Data: Data frame ... supported rates. Reassociation Request and Response: Mobile station that has been associated with a BSS and is now associating with another BSS with the same SSID uses the reassociation req...

Ngày tải lên: 09/03/2014, 13:20