wireless networks the definitive guide

... conference room, in the parking lot, or even in the coffee house across the street As long as the wireless users remain within the range of the base station, they can take advantage of the network Commonly ... a wireless network 1.1.2 The Limits of Wireless Networking Wireless networks do not replace fixed networks The main advantage of mobility is that the network user is moving Servers and other ... with the technical community pays dividends for them down the road As with many other projects, the scope of this book turned out wider than planned One of the later additions to the text was the

Ngày tải lên: 14/08/2014, 13:20

... equal to the length of the frame body plus the IV The keystream is then XORed with the frame body and the IV to cipher it To enable the receiver to decrypt the frame, the IV is ... Chapter 3 Ethernet Type As with any other Ethernet frame, the Ethernet Type field contains the two-byte type... identify the user 2 The end user system prompts for input, collects the user ... Both the supplicant and the authenticator are referred to as Port Authentication Entities (PAEs) in the specification The authenticator... however, the specification allows DHCP and other

Ngày tải lên: 14/08/2014, 13:20

... from the Ethernet to the wireless medium or buffered if the mobile station is in a power-saving state In shared Ethernets, the frame will be sent to all the access points and will be bridged by the ... saves the timestamp from the Beacon or Probe Response and the value of the local timer when it was received To match the local timer to the network timer, a station then takes the timestamp in the ... frame destined for the mobile station, that frame is bridged from the Ethernet to the wireless medium or buffered for a mobile station in a power- The major advantage of wireless networks is that

Ngày tải lên: 14/08/2014, 13:20

... transmission over the air. 10.1.3.1 Framing and whitening The PLCP for the FH PHY adds a five-field header to the frame it receives from the MAC. The PLCP is a relay between the MAC and the physical ... corrections needed to the received signal. Start Frame Delimiter (SFD) As in Ethernet, the SFD signals the end of the preamble and marks the beginning of the frame. The FH PHY uses a 16-bit ... (PLW) The first field in the PLCP header is the PLW. The payload of the PLCP frame is a MAC frame that may be up to 4,095 bytes long. The 12-bit length field informs the receiver of the length

Ngày tải lên: 14/08/2014, 13:20

... does At the top of the dialog box there are fields for selecting the SSID (network name) and the key number to which the key applies The bottom part of the screen shows the key length and the key ... identify the network As with other products, the network name is the SSID of the network You can either type it into the network name field or use the Scan button to pull up a list of networks ... profile, go to the profile category on the left side of the driver, select the profile to use, and click Edit to bring up the Edit Profile dialog box Select the Security tab to bring up the WEP configuration

Ngày tải lên: 14/08/2014, 13:20

... likable. 2. Inbound is not enough. Each of the tactics described in this guide can work on their own. But, for a business to benefit fully from them, they should be combined with outbound marketing. ... Customers? Media? All of the above? Once you’ve decided on the targets, flesh out the defining characteristics of each group. If you’ve already read Marketo's The Definitive Guide to Lead Nurturing, ... addition to the social share buttons that appear at the top, we also prompt our readers to share by having a share box pop up as they are reading the blog, reminding them to share

Ngày tải lên: 18/02/2014, 07:20

... ➡ The coach assumes they have the best answers for the individual, and they often don’t ➡ The focus is mostly on the thoughts of the coach – this reduces the ability of the ... about their own situation than effective conversations and the coach does The coach believes in the ability of the indi- experiences for the. .. and shows you how to apply them in ... contribution to the process of helping people to experience life the way they want to experience it For some people coaching can literally change their lives for the. .. for them or assume

Ngày tải lên: 21/02/2014, 16:20

... Instagram), email marketing, etc They want to find the information they are looking for in the medium that is most convenient for them at the moment Whether they’re in front of their computers at work ... across channels — and then feed them the exact information they want at the moment you interact with them “Building on the vast increase in consumer power brought on by the digital age, marketing ... computing resources they need from the cloud The ability to tap into the cloud is no longer considered an advantage; rather, it’s a way of life Today, being the customer’s first choice is the only remaining

Ngày tải lên: 18/03/2014, 13:20

... attempt to bind to the LDAP directory using the credentials that the user provided If the user is granted access to the directory, the authentication is successful The pam_ldap PAM ... authenticate... transparently authenticate me to the other machines as I accessed them As a user, all of this happens behind the scenes Now we'll peel back the curtain, and uncover the ... mechanisms The basics of what was to become the Kerberos 4 protocol are documented in the Athena Technical Plan Ultimately, the. .. of the Puzzle In the previous chapter, we examined the

Ngày tải lên: 25/03/2014, 10:47

... 3CouchDB: The Definitive GuideTrang 5CouchDB: The Definitive GuideJ Chris Anderson, Jan Lehnardt, and Noah Slater Beijing • Cambridge • Farnham • Köln • Sebastopol • Taipei • Tokyo Trang 6CouchDB: The ... already know everything involved—all you need to learn are the ways CouchDB puts them together Toward the end of the book, we ramp up the experience level to help you get as comfortable building ... developer, don’t worry—by the time you get to the later parts of the book, you should be able to follow along with the harder stuff Now, sit back, relax, and enjoy the ride through the wonderful world

Ngày tải lên: 24/04/2014, 14:58

... Trang 3Mercurial: The Definitive GuideTrang 5Mercurial: The Definitive GuideBryan O’Sullivan Trang 6Mercurial: The Definitive Guideby Bryan O’Sullivan Copyright © 2009 ... against their expected results.The advantage of this approach is that the examples are always accurate; they describe exactly the behavior of the version of Mercurial that’s mentioned at the front ... line of the text message that the creator of the changeset entered to describe the changeset • tag: Some changesets, such as the first in the list above, have a tag field A tag isanother way

Ngày tải lên: 24/04/2014, 15:32

... Trang 3MongoDB: The Definitive GuideTrang 5MongoDB: The Definitive GuideKristina Chodorow and Michael Dirolf Trang 6MongoDB: The Definitive Guideby Kristina Chodorow and Michael ... First Edition Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly Media, Inc MongoDB: The Definitive Guide, the image of a mongoose lemur, ... relational one The primary reason for moving away from the relational model is to make scaling out easier, but there aresome other advantages as well The basic idea is to replace the concept of

Ngày tải lên: 24/04/2014, 15:35

... the following order: x, y, width, height These worklike just about every other windowing system: x and y specify the position of the topleft corner of the window from the top left corner of the ... ods, and even filtered them to find the methods used to speak meth-We can invoke another method to see the status of the object, then define a string andfeed it to the synthesizer to read out loud: ... doc-Let’s open the NSSpeechSynthesizer class documentation so we can see the availablemethods Search for NSSpeechSynthesizer in the documentation and you should findthe NSSpeechSynthesizer class

Ngày tải lên: 05/05/2014, 14:59

... SQL*Plus The Definitive Guide Jonathan Gennick Beijing Cambridge Famham Köln Paris Sebastopol Taipei Tokyo Trang 3Copyright © 1999 O'Reilly & Associates, Inc All rights reserved.Printed in the ... Associates, Inc was aware of the trademark claim, the designations have been printed in caps or initial caps. Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered ... The use of the moving leaf image in association with Oracle SQL*Plus is a trademark of O'Reilly & Associates, Inc. While every precaution has been taken in the preparation of this book, the

Ngày tải lên: 05/07/2014, 04:20

... You do this by placing all the formatting commands and the SELECT query for the report into the script file. Then whenever you want the report, you just execute the script. In addition to producing ... clearly the frustration of working with three manuals spread out in front of me: the SQL manual, the SQL*Plus manual, and the PL/SQL manual. I remember the frustration of frequently picking up the ... open to the chapter on reports and follow the steps. Need to extract data? Open to the chapter on data extraction, and again just follow the steps. Every effort has been made to organize the information

Ngày tải lên: 05/07/2014, 04:20

... see if the value of the variable a is equal to the number 4. If it is, the s the boolean value true. If a is not equal to 4, the result of the else if equals . If so, it adds to ; otherwise, ... in the myform property of an object named . a method, and the property name becomes the method name. To invoke a method of an object, use the . syntax to extract the function value from the ... compute the sine of the numeric value x: In addition to these basic arithmetic operations, JavaScript supports more complex mathematical operations through a large number of mathe part of the language....

Ngày tải lên: 21/08/2012, 09:57

... primes. In the context of the Web and web browsers, however, these aren't particularly interesting applications of the language. As mentioned earlier, the real power of JavaScript lies in the browser ... use the Document object to generate documents entirely from scratch. Furthermore, properties of the Document object allow you to specify colors for the document background, the text, and for the ... by the client, the server executes the script or scripts contained in the document and sends the resulting document (which may be partially static and partially dynamically generated) to the...

Ngày tải lên: 04/11/2013, 11:15

... work. This book, therefore, is the definitive guide to HTML. We give details for all the elements of the HTML 4.0 standard, plus the variety of interesting and useful extensions to the language—some ... in the image, the graphical browser sends the relative x,y coordinates of the mouse posi- tion to the server that is also designated in the anchor. A special server program then translates the ... tags and their attributes. Still others embed HTML tags as they compose. We think the stepwise approach—compose, then mark up—is the better way. We find that once we’ve defined and written the document’s...

Ngày tải lên: 16/01/2014, 16:33

... semantically, the program that produces the online version can determine which occurrences of the word "book" in the text are actually references to the Book element. The the entity ... can reference other documents from within your document. If these entities contain document text (SGML or XML), then references to them cause the parser to insert the text of the external file ... within a document) the structure and semantic content of a document. It does not mark up the way in which the document will appear to the reader, in print or otherwise. In the days before word...

Ngày tải lên: 21/01/2014, 06:20

... ]> These declarations form what is known as the internal subset. The declarations stored in the file referenced by the public or system identifier in the DOCTYPE declaration is called the ... example), there are a few other options available (technically in front of or in place of the text description), but they're rarely used. [4] language Indicates the language in which the ... prologue. The following sections describe the features of the prologue. 2.1.1. An SGML Declaration SGML documents begin with an optional SGML Declaration. The declaration can precede the document...

Ngày tải lên: 21/01/2014, 06:20