Content Delivery Network is the proxy server’s network which is used to transfer the message packets to the different geographical region of the world. The main purpose of this network is to provide the assurance of end to end delivery of the packets. Now, you can access the big content in the fraction of the seconds with high speed and performance. CDN contains any type of content like web pages, video, audios, live streaming media and so on.
Purpose of CDN
CDN is used to shorten the distance between you and the world, virtually. When you activate your internet package, then your PC got a unique IP address (This IP address is assigned by your ISPs), this IP is your identification over the internet. A content provider chooses CDN for the transmission and pays for it. There are also some free CDNs: Free cast, cloud fare, and so on.
When you have launched a site then CDN save the copy of your website’s server at a different location of the world, so the visitor can access his nearer server.
Ranges and Varieties of CDN
The variety of CDN depends upon the number of deployed nodes location and the architecture. Each node connects a separate region, these nodes are also called POPs, edges, edge node or networks. Some CDN covers the range of thousand to ten thousand servers and remote POPs (points of Presence). And some CDN covers the low range i.e. they connect fewer servers.
The purchase package is also different for both CDN and it depends on the type of site you have launched. Most of the CDN provider provide the POPs depending on the selected region like USA, Asia etc. CDN network is designed on the basis of an end to end principle, it keeps the network secure and assures the communication from client to servers.
CDN is based upon the intelligent techniques and applications which are aimed to optimize the delivery of packets. It is similar to the cache that stores the data which is easily accessible in less time. Website cache loads the web pages that have high priority from the main server, instead of accessing the main site server always. It reduces the RRT and improves the performance of the site. CDN is mainly of two types:
- Peer to peer CDNs
In peer to peer CDN, all the clients are sharing their and also using its own resources. In P2P, they don’t use the central device for sharing the information.
- Private CDNs
These CDNs are used by the companies that are not satisfied with the provided CDNs, they can build their own and select the region where they want their site to be accessed.
Advantages of CDNs
Here are some advantages of CDNs:
- It reduces the heavy traffic and smoothes the searches.
- CDNs lessen the loss of the packet and assure the delivery of the packet, end to end.
- You can searches or load the web page or other content in a fraction of seconds.
- It supports the load the content at the time of need.
Disadvantages of CDNs
Here are some disadvantages of CDNs:
- Content provider feels difficulty to choose the region and his clients.
- You may face difficulty to manage the content.
- If you want to change your content, then you have to change the content through the CDNs instead of the main server of the site.