Tag: CDN

Network

Content Delivery Network (CDN) – beginner’s guide

Content Delivery Network (CDN) is great and beneficial. In present days the need for fast and reliable access to any type of content is crucial. That is why it is more important than ever to understand what actually stands behind it. So, let’s take a minute to explain a little bit more about it. 

Content Delivery Network (CDN) explained.

Content Delivery Network (CDN) is a complex solution that focuses on delivering content to clients quickly by applying routing and cache mechanisms. The servers are positioned in very precise locations and cover a wide geographical area. They cache the data (code, videos, images), and the aim is to be as closer as possible to potential visitors. As a result, the clients receive reliable, fast service. In addition, CDN acts as a load balancing mechanism that is going to reduce the pressure on the primary server.

How does Content Delivery Network (CDN) work?

CDN requires an extensive network of servers for caching the data, content that will be spread to particular customers in various locations. Therefore, a well-established infrastructure is key. For that reason, CDN providers determine their PoPs strategically. They analyze the Internet exchange points (IXPs), the physical infrastructure that Internet service providers (ISP) use. On those precise IXPs, speed and placement are the most beneficial. The providers of CDN have to make a decision because having PoPs in each of the possible IXP is going to be very pricy.

Next, thanks to the GeoDNS tech, the visitors of the website are connected to the nearest and fastest server. Moreover, this valuable connection is not relying on receiving the data from the web hosting. It saves a lot of time, which is crucial for these businesses.

Content Delivery Network includes the usage of infrastructure that already exists, and these providers do not own.

CDN providers offer their services, and their customers use them for delivering their content to their users. Yet, CDNs make payments to the carriers, Internet service providers, and network operators for utilizing their data centers to host CDNs’ servers.

Benefits

  • Great speed. The request of the users travel in a short distance, and their answer is provided quickly. The nearest secondary server which has the content available in its cache provides it to the user.
  • The efficient and quick response does not depend only on web hosting.
  • CDN PoPs are placed on IXPs, and for that reason, you have the advantage of high speed and strategic position. Your users can access your content quickly and accurately each time they want it.
  • Improved uptime. Thanks to the many servers that cache the information, if one of them experiences difficulties or is down for some reason (maintenance or attack), the rest will be able to respond. 
  • Less bandwidth. The majority of the request of the users are going to be handled by the secondary servers which are near them. So, the primary server is going to be in need way less. If you think about simply the bandwidth that videos need to be loaded, that is not an unimportant advantage at all. 
DNS

Why should you choose Anycast DNS?

Anycast DNS explained

Anycast DNS is a traffic routing mechanism that delivers content fast from websites. It uses multiple nameservers that hold one individual IP address. 

Every one of the servers is located in a separate geographical location in order to be as close as possible to the users. The reason for that is to achieve a faster response to the request, which leads to a better user experience. The server that is nearest and available to the client requesting the website is going to answer. Any possibilities for latency are reduced to a minimum. Your website is easily reachable, and customers won’t wait long to connect with it.

Additionally, if the nearest server it’s not working due to maintenance, for example, another server, the next closest, is going to answer. 

Anycast DNS manages requests by the quickest route. For that reason, your domain’s resolution time becomes very еxpress. 

Benefits

  • Easy setup – You just have to configure it in only one server. Additionally, such settings can be expanded to the entire network.
  • Improved response time – With directing to the closest available DNS server, the response time is reduced.
  • DDoS protection – In case a DDoS attack appears, only a piece of the whole Anycast DNS group of servers is going to experience it.
  • Reliability – Implementing Anycast improves DNS reliability by establishing many servers in different locations with identical IP address. As a result, the service is more highly available and reliable because of the redundancy of the DNS servers. 

Why should you choose Anycast DNS?

If you are running an international business and your online presence is crucial, Anycast DNS is a great opportunity. Additionally, if you provide a service and you want speed and reliability in every location, you can benefit a lot from this type of routing mechanism. 

Anycast DNS manages the traffic in the most efficient way, plus your customers will be happy to reach your website easily. The improved network converts into a great experience and more sales.

Anycast DNS and CDN

Anycast DNS is a perfect choice for Content Delivery Network (CDN). The reason is its ability to quickly respond to queries and directing the traffic to a close local server.

Let’s picture an example network, where we have customers from 3 different continents: Europe, Asia, and North America. So, we established three copies of the website on three separate servers with different IP addresses. On every continent, we have set up Anycast DNS servers. So, therefore, all the traffic in North America is directed to the DNS server there. The traffic in Asia is directed to the Asian server, and the same runs for Europe.

The CDN is going to reduce the latency significantly for two reasons.

  • First, the Anycast DNS servers are as close as possible to the customers. They are positioned in each continent and even probably in each needed country. The domain is going to resolve very quickly.
  • Second are the several copies of the website. Thus, you are not just responding to the domain name query faster, although you can also manage the traffic to a closer web hosting.

When you combine these two, the customers are receiving the best experience. If the nameservers and web servers are located on different continents, the users will face latency for sure.