chapter 3  network design with ethernet switches

... group of computers and network communication devices interconnected within a geographically limited area LAN provide companies with time and money saving LAN is simple, inexpensive, support many ... plug-and-play compatibility • With plus-and-play, the software will ask some questions so that it can define the parameters required to get your PC communicating with other PCs on the network...

Ngày tải lên: 20/01/2014, 22:20

... and grids With the exception of the tree, these elements are not limited in regard to the content they can contain Currently, the tree only holds text and image content and grids are designed ... markup in Example 3-9 is the rules for the nesting of elements within a listbox structure The number of columns needs to be set, each with a element, and all have to be wrapped in a ... advanced tree widget that was originally designed for the Mail/News component in Mozilla In its first incarnation, it was called the outliner widget The tree is designed for high performance in large...

Ngày tải lên: 17/10/2013, 19:15

... client might also use a Content-type header with the POST or PUT method Most commonly, with many CGI applications, clients use a POST or PUT request with information in the entity-body, and supply ... Pragma header was used with the value no-cache to tell caching proxies and clients not to cache the document Under HTTP 1.1, the Cache-Control header supplants Pragma, with several caching directives ... can use the IfModified-Since header with the GET method When using this option, the client requests the server to send the requested information associated with the URL only if it has been modified...

Ngày tải lên: 17/10/2013, 19:15

... element in the XUL content 3.4.3 Grid A is another XUL table structure, designed to be more flexible with the content it can hold than the other tabular widgets Example 3-12 shows a ... displayed is directly associated with the element using the src attribute You can also use list-style-image, which is a CSS2 property used to associate an image with an element To this, you need ... groups are useful UI controls that present the user with a choice of options in XUL In HTML, radio choices are represented by the element with the type attribute set to the value of radio,...

Ngày tải lên: 20/10/2013, 09:15

... label="New"/> You can associate the image with the button using the src attribute, but the more common way is to use the list-style-image ... Table 3-3 Button types Type Usage Description Menu integrated into the Menu type= "menu" button with small arrow icon Menu appears distinct Dual Menu type= "menu-button" from the button, in separate ... Usage Description in a depressed state and toggles back to its natural state when selected again Designed to be part of a Radio type= "radio" group; only one button is selectable at a time Disclosure...

Ngày tải lên: 20/10/2013, 09:15

... controls used to create a simple three-tab control with content elements on each panel The tabs are associated with the appropriate panels by their order within the containing element 3.9.2.2 Status ... elements within In this example, the icons appear to the left and right of the bar, while the flexed text panel takes up the remaining space 3.9.3 Additional Box Features Boxes work in concert with ... specified as a numerical value, and all flex is relative For example, a child with a flex of is twice as flexible as a child with a flex of 1, as Example 3-20 shows The flex attribute is invaluable...

Ngày tải lên: 24/10/2013, 08:15

... base file at runtime (or be merged with it, as described later in this chapter in the Section 3.11.2 section) When the base element is empty, it is replaced with the corresponding overlay element ... in a base file: When an overlay is read with the content below, the previous line is replaced with that content: Overlay files are XUL files with a xul extension The content within that file has to be contained in an element, which is the root...

Ngày tải lên: 24/10/2013, 08:15

... Three Principles of Data Center Infrastructure Design The Three Principles of Data Center Design When you understand the three principles of data center design, you are able to: • Lower your total ... of data without errors that cause retransmission and delays Cabling and connectivity backed by a reputable vendor with guaranteed error-free performance help avoid poor transmission within the ... Gigabit Ethernet devices to 10 Gbps Ethernet in the future For larger data centers where distances reach beyond 55 meters and transmission speeds are anticipated to reach beyond Gigabit Ethernet, ...

Ngày tải lên: 10/12/2013, 03:15

... /subdir/first.html is executing, it will be designated as the base component Its content gets wrapped by its parents' content, so the component execution starts with /autohandler, which calls /subdir/autohandler ... site that serves news articles, with articles identified by the date they were written Normally articles get published once a day, but once in a while there's a day without an article published ... PerlHandler HTML::Mason::ApacheHandler This directive has a rather strange interaction with Mason's dhandler mechanism If you have a dhandler at /home/httpd/html/dhandler on the filesystem,...

Ngày tải lên: 14/12/2013, 12:15

... General Design Models 1-1 Single-Site Model 1-3 Multiple Sites with Independent Call Processing 1-5 Cisco IP Telephony Network Design Guide 78-11103-03 iii Contents Multisite IP WAN with Distributed ... Multiple Sites with Independent Call Processing, page 1-5 • Multisite IP WAN with Distributed Call Processing, page 1-7 • Multisite IP WAN with Centralized Call Processing, page 1-10 General Design Models ... Telephony Network Design Guide 1-8 78-11103-03 Chapter Introduction Multisite IP WAN with Distributed Call Processing The multisite IP WAN with distributed call processing has the following design characteristics:...

Ngày tải lên: 21/12/2013, 04:19

... Three Principles of Data Center Infrastructure Design The Three Principles of Data Center Design When you understand the three principles of data center design, you are able to: • Lower your total ... of data without errors that cause retransmission and delays Cabling and connectivity backed by a reputable vendor with guaranteed error-free performance help avoid poor transmission within the ... Gigabit Ethernet devices to 10 Gbps Ethernet in the future For larger data centers where distances reach beyond 55 meters and transmission speeds are anticipated to reach beyond Gigabit Ethernet, ...

Ngày tải lên: 16/01/2014, 21:20

... optimum results This practice is opposite to the high-level design paradigm, yet it is frequently used for high-speed designs because designers need to squeeze the last bit of timing out of circuits, ... describe a design in Verilog HDL will not go away Assertion checkers allow checking to be embedded in the RTL code This is a convenient way to checking in the most important parts of a design New ... describe the design For very high-speed and timing-critical circuits like microprocessors, the gate-level netlist provided by logic synthesis tools is not optimal In such cases, designers often...

Ngày tải lên: 21/01/2014, 17:20

... "chrome://communicator/content/pref/prefnavigator.xul" ); 3.2.3 Wizards This type of window is designed for a very specific type of functionality -to walk the user through a step-by-step process, with each step represented by a different screen ... between JavaScript (the main scripting engine used in Mozilla) and the DOM, and it goes further with examples of commonly used methods for querying and modifying a XUL document To view that internal ... correspond to the buttons typically displayed and can execute code in response to user input As with onunload, you can place a function in the ondialogaccept event handler that executes when the...

Ngày tải lên: 26/01/2014, 07:20

Ngày tải lên: 26/01/2014, 07:20

... server will reply with a response line and headers, but no entity-body The headers returned by the server with the HEAD method should be exactly the same as the headers returned with a GET request ... practice, POST is used with CGI programs that happen to interface with other resources like network services and command line programs In the future, POST may be directly interfaced with a wider variety ... are discussed later in this chapter The server responds as follows: The server replies with a status line with the following three fields: the HTTP version, a status code, and description of the...

Ngày tải lên: 26/01/2014, 07:20

... handle with the Accept header and a server could now declare its entity-body's media type with the Content-type header This allowed the client to know what kind of data it was receiving and deal with ... request Either something was wrong with the document, or something was wrong with the request itself By far, the server status code that web users are most familiar with is 404 (Not Found), the code ... Range) Occasionally, the error might be with the server itself or, more commonly, with the CGI portion of the server CGI programmers are painfully familiar with the 500 (Internal Server Error) code,...

Ngày tải lên: 26/01/2014, 07:20

... control) 17 Switches MOS Switches: cmos, rcmos cmos rcmos n_control in when “off” cmos when on R rcmos when on R out p_control cmos (out, in, n_control, p_control) 18 Switches Bidirectional pass switches ... Boring when write, and hard to decode - Essential without integrated design tools Structural model  Structural Models are built from gate primitives, switches, and other modules  Describe the logic ... for 4-to-1 Multiplexer endmodule 15 Switches  There are two kinds of switch: * MOS switches : cmos, nmos, pmos, rcmos, rnmos, rpmos * Bidirectional pass switches: tran, rtran, tranif1, rtranif1,...

Ngày tải lên: 07/03/2014, 14:20

... higher than gatelevel, describe the design using expressions instead of primitive gates  Circuit is designed in terms of dataflow between register, how a design processes data rather than instantiation ... Dataflow modeling  Continuous assignment  Expression, operator, operands  Design examples Dataflow model  For complex design: number of gates is very large -> need a more effective way to describe ... output s, cout); assign s = a^b^cin; assign cout = (a & b) | (cin & (a^b)); endmodule t1 t2 • Let’s design 8-bit adder module adder(cout,s,a,b) ; output cout; output [7:0] s ; input [7:0] a,b ; assign...

Ngày tải lên: 16/03/2014, 15:20

...  Thickwire Ethernet (Thicknet): original Ethernet medium    10BASE­5 Ethernet Thin Ethernet (Thinnet): more flexible and easier to  handle and install than Thicknet  10BASE­2 Ethernet 21 ... Demarcation point: division between service carrier’s network  and internal network Backbone wiring: interconnection between  telecommunications closets, equipment rooms, and  entrance facilities 34 Network+ Guide to Networks, 4e CABLE DESIGN AND MANAGEMENT  ... Connectors: pieces of hardware connecting wire to  network device   Every networking medium requires specific kind of  connector Media converter: hardware enabling networks or  segments running on different media to interconnect ...

Ngày tải lên: 27/06/2014, 05:20

... were described with respect to $VIX can be used on these instruments as well The first was high implied volatility during a falling market We can generalize the concept that was seen with $VIX to ... we must buy There are a number of contrary indicators in technical analysis Most of them have to with measuring sentiment among the majority of the trading or investing public The public tends ... theory is isolating the opinions of the “uninformed” public We not want to distort the statistics with noise, such as arbitrage trading or institutional hedging strategies Those are not market opinion...

Ngày tải lên: 03/07/2014, 19:20