The internet is an interconnection of several computers of different
types belonging to various networks all over the world. It is often
referred to as a network of all networks.
The actual start of the internet can be traced back to 1969, when the U.S. DoD commissioned the APRANET to research networking. "Nodes" or hosts were setup at four locations in the U.S. : University of California at Lo Angeles (UCLA), Stanford Research Institute (SRI), UCSB and the University of Utah. The first node-to-node message was sent in October 1969 between UCLA and SRI.
The internet is a giant network of computers, connected to each other globally. The primary structure of the internet is formed by a series of web servers that are run by certain companies such as Google, Yahoo, Microsoft, AOL, etc. These web servers have websites on them, which they offer for display over the internet. These servers are connected to each other over something called the Internet Backbone, which is the main physical line that runs across the world, linking servers globally. These servers may also be interconnected to each other through networks. Internet Service Providers, or ISPs may be part of these servers, or they may have their own independent servers, offering connectivity to the internet to users. End-users finally connect to the ISPs, thus enabling them to access websites or other computers all over the world through these ISPs' servers.
How it works is simple. When a user requests for a website by typing in a URL in his/her web browser, the request is sent to the ISP, which maintains a Domain Name Service (DNS) server, which can translate the text-based address (such as www.google.com) into the corresponding IP address of the server where the site is located. This request is then sent forward over the internet until it reaches its destination. Similarly, the server responds with a response that is sent backwards over the internet until it reaches the user's computer, and is then displayed on his/her browser.
The actual start of the internet can be traced back to 1969, when the U.S. DoD commissioned the APRANET to research networking. "Nodes" or hosts were setup at four locations in the U.S. : University of California at Lo Angeles (UCLA), Stanford Research Institute (SRI), UCSB and the University of Utah. The first node-to-node message was sent in October 1969 between UCLA and SRI.
The internet is a giant network of computers, connected to each other globally. The primary structure of the internet is formed by a series of web servers that are run by certain companies such as Google, Yahoo, Microsoft, AOL, etc. These web servers have websites on them, which they offer for display over the internet. These servers are connected to each other over something called the Internet Backbone, which is the main physical line that runs across the world, linking servers globally. These servers may also be interconnected to each other through networks. Internet Service Providers, or ISPs may be part of these servers, or they may have their own independent servers, offering connectivity to the internet to users. End-users finally connect to the ISPs, thus enabling them to access websites or other computers all over the world through these ISPs' servers.
How it works is simple. When a user requests for a website by typing in a URL in his/her web browser, the request is sent to the ISP, which maintains a Domain Name Service (DNS) server, which can translate the text-based address (such as www.google.com) into the corresponding IP address of the server where the site is located. This request is then sent forward over the internet until it reaches its destination. Similarly, the server responds with a response that is sent backwards over the internet until it reaches the user's computer, and is then displayed on his/her browser.
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