DNS Prefetch

What is DNS Prefetch?

Presetting, also known as DNS presetting, is the act of decoding a website's IP address before the user clicks on the link. It tries to resolve latency issues associated with DNS resolution that can add a few seconds to a site's page load time (that is, the time it takes to resolve your site's domain name to an IP address).

DNS pre-fetching is just one of many different resource tips a website can use to instruct the browser to do something before doing it otherwise. It is a small, fairly basic resource symptom that allows it to be applied more broadly than other options.

DNS Prefetch can be divided into:

• A web browser starts parsing and viewing a page.
• The browser searches for and resolves the field names associated with the links on the page.
• When a user clicks on a link, the destination IP is already known and the browser is immediately redirected to that server.
  
  

Many browsers can detect and preset field names in hyperlinks on a page. But they may not find the domain contained in the script files and markup placed by analysis and social networking platforms. Addresses redirected to different areas can also pass automatic pre-fetching.In such cases, web developers can manually determine the area the browser will bring in advance.

After explaining what DNS is, it will be even easier to understand what DNS prefetch is. We know that DNS consists of mixed numbers. In order for the pages to work, these numbers must be resolved. DNS Prefetch pre-resolves DNS and serializes internet pages. Thanks to this system, DNS search time on resources other than your own domain is reduced, and the internet page is loaded more quickly. The tags used to do this are not suitable for every page. Before performing the process, it is necessary to have information about this, use the labels in the right places. If not, this process will not provide any benefit and may cause some problems.

It is possible to translate the term DNS Prefetch into Turkish as “DNS pre-fetching”. Internet pages are used for many domains today. This, in turn, requires that this page be connected to different servers. For example, you get 3 different domains on an internet page. The Internet Browser will try to analyze these 3 different domains. But we don't know which Internet Browser will start analyzing first. So we can use the DNS Prefetch tag, reduce the number of queries, and allow existing ones to be resolved before other domains begin to be resolved. A DNS Prefetch tag is a link tag that speeds up page load time and allows it to open faster when you load from a different server. Provides effective solutions when used correctly.

Where is DNS Prefetch used and what does it do?

Used at the beginning of an HTML document. DNS resolution is a known and necessary part of page loading. At Page Speed, You can be sure of a DNS search for each domain name. This means that if your page resources are located in three areas, you will have at least three DNS searches. If you use resources from TEN fields, you perform at least ten DNS searches. Therefore, the best implementation of page speed to minimize DNS requests is very important. (But unfortunately it is often ignored.)  

In order for pages to load more quickly, files from different sources must be prioritized. Resolving the DNS that you offer priority can significantly reduce the speed at which pages open. The link tag you use for this is DNS prefetch. When you use the technique correctly and effectively, you can make pages take action faster.