Download e-book for iPad: A practical guide to content delivery networks by Gilbert Held

By Gilbert Held

ISBN-10: 084933649X

ISBN-13: 9780849336492

Defining the trendy content material supply community as a bunch of geographically dispersed servers deployed, frequently through 3rd events, to facilitate the distribution of knowledge generated through world-wide-web publishers in a well timed and effective demeanour, Held examines their position in facilitating the distribution of varied sorts of internet site visitors, starting from commonplace websites to streaming video and audio. He describes how such networks function, the benefits and downsides linked to utilizing them, and facets of net structure and protocols which are essential to comprehend the applying of the networks. Readers are assumed to be construction human-resource or monetary purposes, sites, or comparable prone. disbursed within the US by way of CRC.

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SCRIPT> Using the SCRIPT LANGUAGE tag, the Web browser is informed how to interpret the code. Although Netscape browsers and some versions of Microsoft’s Internet Explorer support JavaScript, only Microsoft’s Internet Explorer supports VBScript. If a browser does not support a particular scripting language embedded into a Web page, it will either display the script as part of the Web page or hide the script from view. Hiding the script occurs when the script is encased in comment tags () and the browser simply ignores the script.

Under Microsoft Windows, the name of the program was truncated to tracert. Tracert invokes a series of ICMP Echo messages that vary the time-to-live (TTL) field in the IP header. The first IP datagram that transports the ping has a TTL field value of one. Thus, when the datagram reaches the first router along the path to the destination, the router decrements the TTL field value by one and since the result is zero, throws the datagram into the great bit bucket in the sky and returns an ICMP message Type 11 (Time Exceeded) to the originator.

The client will use a browser to access a Web server. The Web server, depending on its coding, can provide several different ways to forward a request to an application server. Some of those ways include using CGI, Microsoft’s Active Server Page, and the Java Server Page. An Active Server Page (ASP) is an HTML page that includes one or more scripts processed by the Web server prior to the Web page being transmitted to the user. An ASP file is created by including a VBScript or JavaScript in an HTML file or by using ActiveX Data Objects program statements in a file.

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A practical guide to content delivery networks by Gilbert Held

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