802.11® Wireless Networks: The Definitive Guide phần 6 ppt

... now. A-1 GUIDE TO SECURING LEGACY IEEE 802.11 WIRELESS NETWORKS 2. Overview of IEEE 802.11 Wireless Local Area Networks Wireless local area networks (WLAN) are groups of wireless networking ... http://grouper .ieee. org/groups/802/11/QuickGuide _IEEE_ 802_WG_and_Activities.htm and http://standards .ieee. org/getieee802. 2-1 GUIDE TO SECURING LEG...

Ngày tải lên: 14/02/2014, 08:20

... Beacon 1 802.11 Wireless Networks: The Definitive Guide ISBN: 0-5 9 6-0 018 3-5 100 transmitting the frame, the mobile station processes the frame with WEP. The header identifying the frame ... dial-up network. Both the supplicant and the authenticator are referred to as Port Authentication Entities (PAEs) in the specification. The authenticator termin...

Ngày tải lên: 25/03/2014, 10:39

... developments of the early to mid-1990s. The alphabet soup of the first edition was gruel compared to the mulligatawny of 2005. Matthew filled the gap between the book and contemporary wireless reality ... introduces the acronyms used throughout the book. With 802.11, the introduction serves another important purpose. 802.11 is superficially similar to Ethernet. Unders...

Ngày tải lên: 05/05/2014, 12:46

... reserve the medium for a fixed time period. The NAV is a timer that indicates the amount of time the medium will be reserved. Stations set the NAV to the time for which they expect to use the medium, ... represented by the bars on the NAV line at the bottom of the figure. The NAV is carried in the frame headers on the RTS and CTS frames; it is depicted on its ow...

Ngày tải lên: 04/07/2014, 08:47

... the processing appears to be atomic from the outside; you cannot insert any operations between the time Ant parses the element and when Ant performs the operations that form the Ant: The Definitive ... as to how Ant& apos;s DataTypes work and how you can use them in your buildfiles. Ant: The Definitive Guide 52 3.4.3.4 The module target The module...

Ngày tải lên: 13/08/2014, 21:21

... speaking, there are many other facets to a task. Ant: The Definitive Guide 84 The Project class The Project class is available in every task as a public instance variable. The class represents ... detailed list of the actions Ant performs on a task during parse-time: 1. Instantiate the task's class. Ant, using the name of the XML element and introspection...

Ngày tải lên: 13/08/2014, 21:21

... *) The text to replace in the source file, not including the @ characters. Ant: The Definitive Guide 156 gunzip all org.apache.tools .ant. taskdefs.GUnzip Expands a GZip file. The ... ignored. 2 This is the same behavior as Java's && operator. 3 This is the same behavior as Java's || operator. Ant: The Definitive Guide 155 S...

Ngày tải lên: 13/08/2014, 21:21

... Override the usual location for Java installed optional packages. Ant: The Definitive Guide 164 gcj The gcj compiler from gcc. sj Symantec The Symantec compiler. extJavac Run either ... in place of the refid attribute. Ant: The Definitive Guide 166 Works only when fork=true. Specifies the maximum memory size for the VM. nowarn (1.4, boolean, N)...

Ngày tải lên: 13/08/2014, 21:21

... with. Ant: The Definitive Guide 301 A.2 Ant1 RIP 2002? So what does this mean for users of Ant1 ? Is it going away the day Ant2 becomes final? Not quite. Even though many of the design ... subjects. The animal on the cover of Ant: The Definitive Guide is a horned lizard. There are 13 species of the horned lizard in North America. Horned lizards prefer a d...

Ngày tải lên: 13/08/2014, 21:21

... Section 12 .1. Nokia C 110 /C 111 Section 12 .2. Lucent ORiNOCO Chapter 13 . Using 802 .11 on Linux Section 13 .1. A Few Words on 802 .11 Hardware Section 13 .2. PCMCIA ... Section 11 .2. OFDM as Applied by 802 .11 a Section 11 .3. OFDM PLCP Section 11 .4. OFDM PMD Section 11 .5. Characteristics of the OFDM PHY Chapter...

Ngày tải lên: 14/08/2014, 13:20

... which is the reverse of the order used in Figure 3-10. Therefore, the frame type is the third bit in the frame control field followed by the second bit (b3 b2), and the subtype is the seventh ... the figure, the "MAC headers" for 8 02. 1h and RFC 10 42 might be the 12 bytes of source and destination MAC address information on Ethernet or the long 8 02. 1...

Ngày tải lên: 14/08/2014, 13:20

... the destination MAC address and the source MAC address. On a wireless network, the MAC header would be the 24- to 30 -byte header described in Chapter 3. Ethernet Type As with any other Ethernet ... use the source address of frames as the identity of the sender; no fields within the frame are used to further identify the sender. There are two information elements in...

Ngày tải lên: 14/08/2014, 13:20

... on the access point; therefore, the Listen Interval is one of the key parameters used in estimating the resources required to support an association. The Listen Interval is a contract with the ... TIM. The lines above the station base lines indicate the ramp-up process of the receiver to listen for the TIM. Figure 7-11. Buffered frame retrieval process At the fi...

Ngày tải lên: 14/08/2014, 13:20

... lower band (5. 15- 5. 25 GHz) 40 mW (2 .5 mW/MHz) 36 40 44 48 5. 180 5. 200 5. 220 5. 240 U-NII mid-band (5. 25- 5. 35 GHz) 200 mW (12 .5 mW/MHz) 52 56 60 64 5. 260 5. 280 5. 300 5. 320 ... band (5. 7 25- 5.8 25 GHz) 800 mW (50 mW/MHz) 149 153 157 161 5. 7 45 5. 7 65 5. 7 85 5. 8 05 [a] The allowed power is the maximum output power usin...

Ngày tải lên: 14/08/2014, 13:20

... classify them any further. Brave, stout-hearted readers can order the specification from the PCMCIA and use the dump_cis tool on Linux to read the CIS of inserted cards. The CIS assists the host ... script on the wireless station to send traffic periodically to prevent the association from timing out. 13.3 .6. 6 "MAC initialization failure, result=xxx" The fi...

Ngày tải lên: 14/08/2014, 13:20