802 11® Wireless Networks: The Definitive Guide phần 5 pptx

802.11® Wireless Networks: The Definitive Guide phần 5 pptx

... 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 Simplistic ... 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 using a 6-dBi antenna gain. There is one other ... In keeping with the IEEE numbering convention, the second extension was labeled 802. 11b. 802. 11b adds another physical layer into the mix. It uses the same MAC as all the other physical layers...

802.11® Wireless Networks: The Definitive Guide phần 1 pot

... GHz C-Band Radar (weather) 5. 25- 5.9 25 GHz C-Band ISM 5. 7 25- 5.8 75 GHz C-Band satellite uplink 5. 9 25- 6.4 25 GHz X-Band 8-12 GHz X-Band Radar (police/weather) 8 .5- 10 .55 GHz Ku-Band 12-18 GHz ... common 802. 11 equipment as this book was written. 802. 11g up to 54 Mbps 2.4 GHz Not yet standardized. 802. 11® Wireless Networks: The Definitive Guide By Matthew Gast ... 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...

802.11® Wireless Networks: The Definitive Guide phần 2 ppsx

... 255 ). Each time the retry counter increases, the contention window moves to the next greatest power of two. The size of the contention window is limited by the physical layer. For example, the ... 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 ... Generic 802. 11 MAC frame 802. 11 MAC frames do not include some of the classic Ethernet frame features, most notably the type/length field and the preamble. The preamble is part of the physical...

802.11® Wireless Networks: The Definitive Guide phần 3 doc

... 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 the body of the authentication ... successful 802. 1x authentication, the access point drops all non -802. 1x traffic. Once the authentication succeeds, the access point removes the filter and allows traffic to flow normally. The second ... displayed to enter the credentials that will be passed to the authentication server. 6.3 802. 1x on Wireless LANs 802. 1x provides a framework for user authentication over wireless LANs. The only minor...

802.11® Wireless Networks: The Definitive Guide phần 4 pot

... States, the following three bands are called the Unlicensed National Information Infrastructure (UNII) bands:[2] [2] The UNII bands are defined by FCC part 15. 407. • 5. 15- 5. 25 GHz • 5. 25- 5. 35 ... GHz • 5. 25- 5. 35 GHz • 5. 7 25- 5.8 25 GHz Devices operating in the UNII bands must obey limitations on radiated power, but there are no further constraints imposed on them. European regulatory ... preauthentication Preauthentication is not used in the most literal interpretation of 802. 11, shown in Figure 7-6a. As the mobile station moves to the right, the signal from AP1 weakens. The...

802.11® Wireless Networks: The Definitive Guide phần 6 ppt

... IPADDR=192.168.200.1 25 NETMASK= 255 . 255 . 255 .0 NETWORK=192.168.200.0 BROADCAST=192.168.200. 255 ONBOOT=no Bringing up the interface is a matter of running ifup with the interface name as an ... 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 ... prompts you to insert the card into the computer to complete the installation. When the card is inserted into the PC Card slot, the message shown in Figure 12-3 appears, and the installation is...

802.11 wireless networks the definitive guide second edition

... downlink3.7-4.2 GHzC-Band Radar (weather) 5. 25- 5.9 25 GHzC-Band ISM 5. 7 25- 5.8 75 GHzC-Band satellite uplink 5. 9 25- 6.4 25 GHzX-Band8-12 GHzX-Band Radar (police/weather)8 .5- 10 .55 GHzKu-Band12-18 GHzKu-Band ... operate a low-power wireless LAN. 802. 11® Wireless Networks The Definitive Guide By Matthew Gast Publisher: O'ReillyPub Date: April 2 0 05 ISBN: 0 -59 6-1 0 0 52 -3Pages: 656 Table of Contents ... orsecurity.Chapter 6, User Authentication with 802. 1X, describes the 802. 1X authentication framework. Inconjunction with the Extensible Authentication Protocol, 802. 1X provides strong authenticationsolutions...

o'reilly-802.11 wireless networks- the definitive guide

... GHz C-Band Radar (weather) 5. 25- 5.9 25 GHz C-Band ISM 5. 7 25- 5.8 75 GHz C-Band satellite uplink 5. 9 25- 6.4 25 GHz X-Band 8-12 GHz X-Band Radar (police/weather) 8 .5- 10 .55 GHz Ku-Band 12-18 GHz ... loss due to the unreliability of the wireless medium. products based on the 802. 11a standard, WECA will allow use of the Wi-Fi5 mark. The " ;5& quot; reflects the fact that 802. 11a products ... anything. Furthermore, nodes 1 and 3 would not have any indication of the error because the collision was local to node 2. 802. 11® Wireless Networks: The Definitive Guide By Matthew Gast ...

o'reilly - 802.11 wireles networks the definitive guide

... Beacon 1 802. 11® Wireless Networks: The Definitive Guide – ISBN: 0 -59 6-00183 -5 100transmitting the frame, the mobile station processes the frame with WEP. The header identifying the frame ... as the identity of the sender; no fields within the frame are used to further identify the sender. There are two information elements in the body of the authentication request. First, the Authentication ... 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...

Ant The Definitive Guide phần 2 pptx

... Ant: The Definitive Guide 50 • The source directory • The classpath • The destination directory We specify the source directory (the place in which the Java source files are stored) with the ... can use them in your buildfiles. Ant: The Definitive Guide 52 3.4.3.4 The module target The module target is almost identical to the bot target. The javac and jar tasks use nearly the same ... files, then stop. From there, review how you're installing the application and see if you can move on. Ant: The Definitive Guide 45 <! Generate the API documentation for the IRC...

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