CDN is a popular solution which is used to increase the speed and security of websites. There are various choice in the industry, some are free and some are paid. In below, we list top 10 best CDN service providers who rank top based on the data from our professional editor reviews and their customer reviews.
FastBy caching your static content to the servers around the world, CDN will reroute your visitors to the server closest to their location to lower latency and increase the speed.
Secured & ReliableCDN service is built on highly reliable infrastructure. Most of them also offer DDos service to their customers.
Easy-to-useIt's easy to enable CDN. There is no need to make changes to your existing source except changing the DNS configuration. You could easily enable or disable it in seconds.
Cost-EffectiveCDN is affordable. You have no need to build the whole network by yourself, and the fee is charged based on how much resource your website consumes.
What is CDN?
The term CDN stands for Content Delivery Network. It is a group of distributed servers, networked together, so that they can easily deliver webpages and web content to users whenever they require it. The key feature of CDN includes it overcomes the location barrier. Whenever users ask for content or want to visit a webpage the servers in the CDN synchronize and optimize within themselves to serve the user demand. An user sitting in China may look for a data which is kept in a server in Germany. So, whenever the user looks for the data, the content has to pass through number of network hops to reach the Chinese user. But when there are high number of user traffic, the hops get busy and the service quality fails. CDN came as a solution for it. In CDN the content is shared among the servers so whenever a user demands it the content can be locally produce without affecting the efficiency of other servers.
How CDN works?
Speed, crash resistance, improved user experience and better SEO performance are few of the core benefits that CDN delivers to web developers and operators. The CDN comprises of origin server, edge server, end user and their connections. Origin server is the primary one which is connected with edge servers to serve the end users. Developers need to use ligttpd, BGP, anycast type of technology standards to develop CDN. Notably, only the static content are distributable through CDN. The static content get hosted on web host servers that connects with network of servers situated in different parts of the world and cache the content. Once user’s request is generated the request is transmitted in the edge server that results in creation of point of presence (PoP). PoP then estimates the user proximity and provides the most efficient load time solution.
For improving the user experience, and reducing the transmission expenses, many businesses are nowadays preferring to create servers which have copies of the multiple data present in strategic locations all around the world. It has benefits in operation and in keeping the cost down.
What kind of performance would the CDN try to solve?
Most of the content delivery network can easily solve the ancillary problems like reducing the given bandwidth, making improvisation to the global availability, etc. And the interesting aspect is that they solve the major problem which is addressing the latency. Here the latency means the basic amount of time it would take the host server for receiving the particular process, delivering the given request for the particular page resources like CSS file, images, etc.
Basically, the latency would simply depend on how far the given user is away from the server. And the interesting aspect is that it is compounded by the available number of resources which contains the given pages. Now for example, if all the given resources of a particular website are situated in San Francisco, and a user from London is visiting the page, then each of the request would take a long trip from London to SF and then back to the London server. So, just imagine if a web page has about 100 objects (in most of the cases this is low in terms of normal ones) then the browser would have to make about 100 individual request to the given server of the web in order to retrieve the given objects.
Here, the latency is somewhere about 75 to 140ms range. However, somewhat it can be quite higher for most of the mobile users who constantly access the website over the 3G internet network. Somewhat this can just add up to about two or three seconds of the load time. This is somewhat a huge deal when one considers the main factor among the various aspects which could slow down the pages.
Can the CDN assist in all situations?
It is important to have CDN for various websites, however, one may have to know that it is not always necessary for all kinds of websites. For example, just think about it. If you are just locally hosting and all the users are the local person, then you won’t need the CDN.
Frankly, to what some of the major website owners believe, it is important to note that the CDN is a simple standalone and best performance solution. It is important to keep in mind about what is the meaning of e-commerce is and the SaaS worlds. These are the main two common kinds of performance pains which are just third-party contents and especially server-sided ones. In such cases, the CDN cannot be of a help for you.
However, when you have lots of websites to run and you have users from different parts of the world, CDN is essential to give them better user experience. CDN is indeed related with your traffic management. So, whenever you have lots of traffic, that are organic, you need to go for content delivery network.