Network

DNS Network

DNS load balancing – the best way to manage your traffic

DNS load balancing – Definition

DNS load balancing is a very commonly used technique for achieving the optimal management of the incoming traffic of a hostname. It provides an organized and effective way of spreading the inbound network or application traffic across multiple servers.

If you are an owner of a very popular website, suddenly you would notice that the traffic is going to be a lot. It is going to receive many numerous requests from customers and users. For each of these requests, it is going to be necessary to return a fast and accurate answer with the exact piece of data, such as video, text, and images. In addition, the whole process must be completed in a secure and reliable way.

First, the DNS load balancers are going to utilize several criteria and examine the incoming traffic. The next second step for them is to choose and determine to let the traffic proceed or, in another circumstance, to stop it. They can decide to redirect it to a different server based on a load of a packet at a particular moment.

How does it work?

For the purpose to understand better the process in which DNS load balancing works, it is best to follow its usual order:

  1. Traffic gets to your website. Users and clients create a lot of requests toward your website’s server by the Internet.
  2. The traffic is distributed over the server resources. The load balancer takes each request and directs it to an appropriate server.
  3. Each server operates with a reasonable workload. The server receives the request, and it decides to accept it. Next, it replies with an answer to the balancer in case it is not flooded with too many requests.
  4. The server responds to the query. Finally, the process is completed again but in a backward direction to carry the server’s response back to the user.

Why is DNS load balancing best for traffic management?

There are a couple of main ideas for implementing DNS load balancing: 

  • Speed. The most apparent purpose is better speed. There is no uncertainty regarding that. If there is a DNS network of servers including many locations all around the world, your visitor is going to get much faster responses. Speed is a severe factor for SEO. Therefore you can positively have an advantage above your competitor with a well-configured DNS balancer. 
  • Security. As we previously mentioned, it is capable of examining the incoming traffic. It could check the data packets for errors and prevent malicious efforts to harm your DNS server. It could prevent severe difficulties leading to data breaches, phishing attacks on your customers, downtime, and more. 
  • Reliability. Directing the traffic among the multiple DNS servers could prevent DDoS attacks and be beneficial even in everyday situations. Picture that you have a sale on your website, and you are aware that a peak of traffic during a particular time is possible. If you don’t have additional help, your website could crash, and you will have lots of annoyed clients. This could perhaps harm your brand. 
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.