A network of servers all over the world that delivers data to web users. Content Deliver Networks (CDN) have three main components: Origin servers, edge servers, and DNS servers.

Origin server

The Origin server stores all the data which is spread all over the world. It is the main server that handles every delivery and also it maintains the updated version of data.

Edge server

The Edge server stores temporary copies of the original data. It is responsible for delivering the data to the nearest web user.

DNS server

The DNS server keeps track of the IP addresses. Whenever a request is sent through the web browser, the Origin server gives the IP address in response.

Benefits

• Fastest Delivery: CDN delivers data very fast because of Edge server’s geographical advantage. It also handles web traffic which helps decrease page loading time.
• Bandwidth Cost: It reduces the bandwidth cost by providing a cache system, and lower bandwidth consumption.
• Security: CDN provides all the prottection needed to prevent any security breaches.