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We will use VLC for its original purpose: broadcast a video on your local network. The typical case being that of a video stored on desktop PC hard drive that shall be sharded to be watched on some other parts. This intends that VLC is installed on both ends of the chain: the desktop PC that sends the video and the receiver.
Sitemap is used to tell search engines about the pages in your site, their relative importance to each other, and how often they are updated. HTML sitemaps are designed for the user to help them find content on the page. It is a mean to help visitors and search engine bots find pages on the site.
fwSitemap Component is a Joomla! 1.5 and 2.5 component that lets you create such sitemaps for Joomla based sites.
A complex page means more bytes to download and it also means slower DOM access in JavaScript. It makes a difference if you loop through 500 or 5000 DOM elements on the page when you want to add an event handler for example.
HTTP cookies are used for a variety of reasons such as authentication and personalization. Information about cookies is exchanged in the HTTP headers between web servers and browsers. It's important to keep the size of cookies as low as possible to minimize the impact on the user's response time.
One of the cited benefits of Ajax is that it provides instantaneous feedback to the user because it requests information asynchronously from the backend web server. However, using Ajax is no guarantee that the user won't be twiddling his thumbs waiting for those asynchronous JavaScript and XML responses to return. In many applications, whether or not the user is kept waiting depends on how Ajax is used. For example, in a web-based email client the user will be kept waiting for the results of an Ajax request to find all the email messages that match their search criteria. It's important to remember that "asynchronous" does not imply "instantaneous".