How does the web work?
The web is a system for publishing pages of information on the internet, and for linking pages together using links.Anyone can publish a page by uploading it to a web server. Anyone can read that page by typing its address into a web browser. This makes it very easy for people to share documents even if they are using what would otherwise be incompatible computers. In fact, that’s exactly why Tim Berners-Lee invented the World Wide Web in the early 1990s.
The web would be useful but annoying if you had to type the precise address - the URL (uniform resource locator) - for every page you wanted. Fortunately, you don’t have to. Web pages can include embedded links or ’hyperlinks’, so simply clicking the link will take you to that page. Following a trail of links is called ‘web surfing’.
Web pages are written in text with Hypertext Markup Language (HTML), then uploaded to a host computer running web server software, such as Apache or Microsoft’s IIS (Internet Information Server).
The web server sends out pages when they are requested by a web browser, such as Microsoft Internet Explorer, Mozilla Firefox or Google Chrome. The host and client communicate using an agreed ’language’ called HTTP (HyperText Transfer Protocol). This is why web page addresses begin with http:// and so on.
http://www.bbc.co.uk/webwise/guides/how-the-web-works
HTML intro
HTML markup tags are usually called HTML tags.
- HTML tags are keywords (tag names) surrounded by angle brackets like <html>
- HTML tags normally come in pairs like <p> and </p>
- The first tag in a pair is the start tag, the second tag is the end tag
- The end tag is written like the start tag, with a slash before the tag name
- Start and end tags are also called opening tags and closing tags
HTML Page Structure
Below is a visualization of an HTML page structure:
Below is a visualization of an HTML page structure:
<html>
<body>
</html>
<h1>This is a heading</h1>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
</body>
http://www.w3schools.com/html/html_intro.asp
Social Media Intro
Social Media Intro
The term "social network" has been around since the 1950s, but the meteoric rise of social-networking Web sites like MySpace, Facebook and Linkedin has turned a dusty sociological phrase into the hottest buzzword of the Internet age.
A social network is a social structure that maps out the relationships between individuals. Technically we all belong to one giant social network, but we also belong to smaller, tighter social networks defined by our families, our friends, where we live, where we work, where we went to school, our hobbies and interests and much more.
Social Networks History
In the early 1930s, a self-published psychologist named Dr. Jacob Levi Moreno introduced the sociogram, the first formal attempt to map out the relationships within a group of people. Moreno's sociogram -- a cluster of individual points, or "nodes," connected by straight lines -- became a powerful tool for identifying social leaders, outsiders, and what he called the "sociometric star," the person to whom all others are connected.
In 1954, anthropologist J. A. Barnes used the phrase "social network" to describe the complex relationships in a Norwegian fishing village.
http://en.wikipedia.org/wiki/Jacob_L._Moreno
http://money.howstuffworks.com/business-communications/how-social-networks-work.htm
