Project PDA

Used with a Wi-Fi connection allows you peruse the internet as you would from a desktop computer.

Web browsers communicate with web servers primarily using HTTP (hypertext transfer protocol) to fetch webpages. HTTP allows web browsers to submit information to web servers as well as fetch web pages from them. The most commonly used HTTP is HTTP/1.1, which is fully defined in RFC 2616. HTTP/1.1 has its own required standards that Internet Explorer does not fully support, but most other current-generation web browsers do.

Web browsers communicate with web servers primarily using HTTP (hypertext transfer protocol) to fetch webpages. HTTP allows web browsers to submit information to web servers as well as fetch web pages from them. The most commonly used HTTP is HTTP/1.1, which is fully defined in RFC 2616. HTTP/1.1 has its own required standards that Internet Explorer does not fully support, but most other current-generation web browsers do.

Pages are located by means of a URL (uniform resource locator), which is treated as an address, beginning with http: for HTTP access. Many browsers also support a variety of other URL types and their corresponding protocols, such as ftp: for FTP (file transfer protocol), rtsp: for RTSP (real-time streaming protocol), and https: for HTTPS (an SSL encrypted version of HTTP).

The file format for a web page is usually HTML (hyper-text markup language) and is identified in the HTTP protocol using a MIME content type. Most browsers natively support a variety of formats in addition to HTML, such as the JPEG, PNG and GIF image formats, and can be extended to support more through the use of plugins. The combination of HTTP content type and URL protocol specification allows web page designers to embed images, animations, video, sound, and streaming media into a web page, or to make them accessible through the web page.

Pages are located by means of a URL (uniform resource locator), which is treated as an address, beginning with http: for HTTP access. Many browsers also support a variety of other URL types and their corresponding protocols, such as ftp: for FTP (file transfer protocol), rtsp: for RTSP (real-time streaming protocol), and https: for HTTPS (an SSL encrypted version of HTTP).

Different browsers can be distinguished from each other by the features they support. Modern browsers and web pages tend to utilize many features and techniques that did not exist in the early days of the web. As noted earlier, with the browser wars there was a rapid and chaotic expansion of browser and World Wide Web feature sets.

The following is a list of some of the most notable features:

• HTTP and HTTPS
• HTML, XML and XHTML
• Graphics file formats including GIF, PNG, JPEG, and SVG
• Cascading Style Sheets (CSS)
• JavaScript (Dynamic HTML) and XMLHttpRequest
• Cookie
• Digital certificates
• Favicons
• RSS, Atom

Some of the more popular browsers include additional components to support Usenet news, IRC (Internet relay chat), and e-mail. Protocols supported may include NNTP (network news transfer protocol), SMTP (simple mail transfer protocol), IMAP (Internet message access protocol), and POP (post office protocol). These browsers are often referred to as Internet suites or application suites rather than merely web browsers.