.::How the Web
Works
The Internet is a complex network of computers linked together all over the
world via an assortment of transmission mediums.
.::Early Beginnings
The Internet was first conceived in 1969 in the form of ARPANet, a US Government
funded venture to share academic information from Supercomputer Sites to
Educational and Research Institutes. By 1990, the internet had steadily grown
throughout America and, although originally designed to exchange electronic
documents, the commercial value of the internet was forseen.
.::The 90's Explosion
In the mid 1990's, a contingent of major Telecommunications companies started to
outlay POPs (Points of Presence) across America and not long after the Internet
became widely available to people world wide. This began one of the biggest
explosions of growth in the telecommunications industry ever. Today over 65% of
the worlds population use the internet regularly whilst 30% use it on a day to
day basis for a multitude of reasons such as work, research, shopping and
entertainment.
.::Addressing Everyone
Nowadays the Internet contains close to 100 million computers all
connected together in some way or form to share information from one computer to
another. Each computer is assigned a unique sequence of numbers known as an IP
Address (Internet Protocol Address). Each IP Address has a sequence of 4 sets of
numbers separated by a period. for example. 198.232.328.235 . These IP addresses
can be dynamically assigned or static. Static IP's are mostly used for servers
that are connected permanently to the Internet whilst dynamic IP's are assigned
to dialup connections for end users.
.::What are Servers ?
A Server is usually a high spec computer that has been optimized to
serve information through a high bandwidth link to users all around the world.
Servers contain websites which consists of databases, files, applications,
images, which can all be requested via a web browser on the users end. A user
requests information from a Server by entering the IP address or domain name of
the Server. The users computer will send its own IP Address to tell the Server
where to send the information to. The Server will then create a connection to
the users computer and transmit the requested information through that
connection.
.::TCP/IP
TCP/IP is the base standard protocol used on the Internet for one
computer to exchange, request or send information with another. The basic
exchange of information from one computer to another is usually called
downloading or uploading. Downloading a typical page from a website will take
multiple requests to a server to download all of the components of the web page
so the browser can render and display the page. This page you are reading now
consists of 6 components. 2 images, 3 HTML pages and a Style Sheet. For those
who don't know what HTML pages or Style Sheets are it is not really important at
the moment but we will cover these later.
.::What else can I do ?
Aside from browsing webpages you can use applications such as Instant
Messaging Programs that instantly 'zap' messages from one person to another. P2P
(Peer to Peer) File Sharing is a relatively new utilization of the Internet
which allows you to search and exchange files with another person. Although the
oldest and one of the most commonly used applications of the Internet is Email
or electronic mail which has been a mainstay since the Internets conception over
3 decades ago. Email allows a user to send electronic documents and files
instantaneously throughout the world. Email is sent via a protocol called SMTP
(Simple Mail Transfer Protocol) which can be utilised via a client side email
program. Companies such as Server101 offer web based email where you can compose
and read your email from within your web browser. This can be especially
convenient for clients that travel regularly.