| CDN is a growing term which is being widely termed | | | | performance of the server, number of networks |
| as one of the most wanted delivery service satisfier | | | | should be at the least distance from the client's |
| for customers. It stands for content delivery | | | | requesting node, one which has the least number of |
| network. It is a tried and tested mechanism to collect | | | | hops, etc. This optimises the content delivery beyond |
| more hits and add sales value to your web portal. | | | | the networks available locally. Another point here is |
| One essential parameter here is the CDN nodes? | | | | that many even look at the cost factor while looking |
| When the end user demands a particular type of | | | | out for an ideal location of CDN. At times, the cost |
| content, instead of delivering the content from the | | | | factor alone forces the client to choose a specific |
| base site, it is delivered from these CDN nodes. The | | | | location. |
| CDN nodes do not deploy usually in single locations, | | | | Most CDN usually tries to get a scenario which is |
| but in multiple locations. There is mutual co-operation | | | | optimal and has two goals in mind to align. One is that |
| between them which satisfies content requests | | | | it should serve the client in the best possible way so |
| which are made by the end users. This basically | | | | that is does not hurt the user's pockets by being too |
| means that the content is moved to optimizing the | | | | expensive. Second point here is that it should be |
| process of delivery. This optimizing process may | | | | closest to the client's node. |
| result in an increase in the content's availability | | | | The CDN mostly operates as one ASP (application |
| globally, performance of the end-user is improved | | | | service provider) while online on the internet. In fact |
| and bandwidth costs are reduced. | | | | nowadays, many network owners are increasingly |
| Another point which matters in here is that how | | | | attempting to make their own CDN which increases |
| many servers and nodes make a CDN? This depends | | | | their revenue, improve delivery of net- content and |
| on the making of a CDN. The nodes in a CDN range | | | | reduce reliance on other operators. Some network |
| from a few nodes to ten thousands nodes. There is | | | | owners however even create their own software |
| a few which in fact even build a network globally and | | | | for internal CDN and some just flatly make use of |
| have just a few geographical pops. | | | | software which is available commercially. This is |
| When the performance optimization process is under | | | | because after being plugged in the CDN, as the logs |
| way, one opts to choose those locations which | | | | of usage are not available for a longer period at the |
| serve the content to the end user in the best | | | | server's content source. |
| possible way. One might wonder as to how is this | | | | There are many online CDN which can be beneficial in |
| selection made for CDN. This selection is made | | | | managing, distributing and monitoring one's content. |
| keeping in mind a few points such as a location which | | | | Therefore one can come to know about the |
| has the highest availability when talking of the | | | | effectiveness of CDN. |